diff --git a/Hcs.WebApp/Data/Hcs/Migrations/20251022073558_CreateHcsSchema.Designer.cs b/Hcs.WebApp/Data/Hcs/Migrations/20251022073558_CreateHcsSchema.Designer.cs
deleted file mode 100644
index 092737e..0000000
--- a/Hcs.WebApp/Data/Hcs/Migrations/20251022073558_CreateHcsSchema.Designer.cs
+++ /dev/null
@@ -1,82 +0,0 @@
-// <auto-generated />
-using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.Infrastructure;
-using Microsoft.EntityFrameworkCore.Migrations;
-
-#nullable disable
-namespace Hcs.WebApp.Data.Hcs.Migrations
-{
-    [DbContext(typeof(HcsDbContext))]
-    [Migration("20251022073558_CreateHcsSchema")]
-    partial class CreateHcsSchema
-    {
-        /// <inheritdoc />
-        protected override void BuildTargetModel(ModelBuilder modelBuilder)
-        {
-#pragma warning disable 612, 618
-            modelBuilder
-                .HasAnnotation("ProductVersion", "9.0.9")
-                .HasAnnotation("Relational:MaxIdentifierLength", 128);
-
-            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
-
-            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Registry", b =>
-            {
-                b.Property<string>("Id")
-                    .HasColumnType("nvarchar(450)");
-
-                b.Property<int>("Number")
-                    .HasColumnType("int");
-
-                b.HasKey("Id");
-
-                b.ToTable("Registries");
-            });
-
-            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.RegistryElement", b =>
-            {
-                b.Property<string>("Id")
-                    .HasColumnType("nvarchar(450)");
-
-                b.Property<string>("Code")
-                    .IsRequired()
-                    .HasColumnType("nvarchar(max)");
-
-                b.Property<string>("GUID")
-                    .IsRequired()
-                    .HasColumnType("nvarchar(max)");
-
-                b.Property<string>("RegistryId")
-                    .IsRequired()
-                    .HasColumnType("nvarchar(450)");
-
-                b.Property<string>("Xml")
-                    .IsRequired()
-                    .HasColumnType("nvarchar(max)");
-
-                b.HasKey("Id");
-
-                b.HasIndex("RegistryId");
-
-                b.ToTable("Elements");
-            });
-
-            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.RegistryElement", b =>
-            {
-                b.HasOne("Hcs.WebApp.Data.Hcs.Registry", "Registry")
-                    .WithMany("Elements")
-                    .HasForeignKey("RegistryId")
-                    .OnDelete(DeleteBehavior.Cascade)
-                    .IsRequired();
-
-                b.Navigation("Registry");
-            });
-
-            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Registry", b =>
-            {
-                b.Navigation("Elements");
-            });
-#pragma warning restore 612, 618
-        }
-    }
-}
diff --git a/Hcs.WebApp/Data/Hcs/Migrations/20251022075934_SpecifyCommonRegistry.Designer.cs b/Hcs.WebApp/Data/Hcs/Migrations/20251022075934_SpecifyCommonRegistry.Designer.cs
deleted file mode 100644
index bb7245c..0000000
--- a/Hcs.WebApp/Data/Hcs/Migrations/20251022075934_SpecifyCommonRegistry.Designer.cs
+++ /dev/null
@@ -1,85 +0,0 @@
-// <auto-generated />
-using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.Infrastructure;
-using Microsoft.EntityFrameworkCore.Migrations;
-
-#nullable disable
-namespace Hcs.WebApp.Data.Hcs.Migrations
-{
-    [DbContext(typeof(HcsDbContext))]
-    [Migration("20251022075934_SpecifyCommonRegistry")]
-    partial class SpecifyCommonRegistry
-    {
-        /// <inheritdoc />
-        protected override void BuildTargetModel(ModelBuilder modelBuilder)
-        {
-#pragma warning disable 612, 618
-            modelBuilder
-                .HasAnnotation("ProductVersion", "9.0.9")
-                .HasAnnotation("Relational:MaxIdentifierLength", 128);
-
-            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
-
-            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Registry", b =>
-            {
-                b.Property<string>("Id")
-                    .HasColumnType("nvarchar(450)");
-
-                b.Property<bool>("IsCommon")
-                    .HasColumnType("bit");
-
-                b.Property<int>("Number")
-                    .HasColumnType("int");
-
-                b.HasKey("Id");
-
-                b.ToTable("Registries");
-            });
-
-            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.RegistryElement", b =>
-            {
-                b.Property<string>("Id")
-                    .HasColumnType("nvarchar(450)");
-
-                b.Property<string>("Code")
-                    .IsRequired()
-                    .HasColumnType("nvarchar(max)");
-
-                b.Property<string>("GUID")
-                    .IsRequired()
-                    .HasColumnType("nvarchar(max)");
-
-                b.Property<string>("RegistryId")
-                    .IsRequired()
-                    .HasColumnType("nvarchar(450)");
-
-                b.Property<string>("Xml")
-                    .IsRequired()
-                    .HasColumnType("nvarchar(max)");
-
-                b.HasKey("Id");
-
-                b.HasIndex("RegistryId");
-
-                b.ToTable("Elements");
-            });
-
-            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.RegistryElement", b =>
-            {
-                b.HasOne("Hcs.WebApp.Data.Hcs.Registry", "Registry")
-                    .WithMany("Elements")
-                    .HasForeignKey("RegistryId")
-                    .OnDelete(DeleteBehavior.Cascade)
-                    .IsRequired();
-
-                b.Navigation("Registry");
-            });
-
-            modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Registry", b =>
-            {
-                b.Navigation("Elements");
-            });
-#pragma warning restore 612, 618
-        }
-    }
-}
diff --git a/Hcs.WebApp/Data/Hcs/Migrations/20251022075934_SpecifyCommonRegistry.cs b/Hcs.WebApp/Data/Hcs/Migrations/20251022075934_SpecifyCommonRegistry.cs
deleted file mode 100644
index 547f37b..0000000
--- a/Hcs.WebApp/Data/Hcs/Migrations/20251022075934_SpecifyCommonRegistry.cs
+++ /dev/null
@@ -1,28 +0,0 @@
-using Microsoft.EntityFrameworkCore.Migrations;
-
-#nullable disable
-namespace Hcs.WebApp.Data.Hcs.Migrations
-{
-    /// <inheritdoc />
-    public partial class SpecifyCommonRegistry : Migration
-    {
-        /// <inheritdoc />
-        protected override void Up(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.AddColumn<bool>(
-                name: "IsCommon",
-                table: "Registries",
-                type: "bit",
-                nullable: false,
-                defaultValue: false);
-        }
-
-        /// <inheritdoc />
-        protected override void Down(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.DropColumn(
-                name: "IsCommon",
-                table: "Registries");
-        }
-    }
-}
diff --git a/Hcs.WebApp/Data/Hcs/Migrations/20251023014411_AddOperation.cs b/Hcs.WebApp/Data/Hcs/Migrations/20251023014411_AddOperation.cs
deleted file mode 100644
index a5099f6..0000000
--- a/Hcs.WebApp/Data/Hcs/Migrations/20251023014411_AddOperation.cs
+++ /dev/null
@@ -1,58 +0,0 @@
-using Microsoft.EntityFrameworkCore.Migrations;
-
-#nullable disable
-namespace Hcs.WebApp.Data.Hcs.Migrations
-{
-    /// <inheritdoc />
-    public partial class AddOperation : Migration
-    {
-        /// <inheritdoc />
-        protected override void Up(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.AddColumn<string>(
-                name: "Name",
-                table: "Registries",
-                type: "nvarchar(max)",
-                nullable: false,
-                defaultValue: "");
-
-            migrationBuilder.AddColumn<DateTime>(
-                name: "UpdatedAt",
-                table: "Registries",
-                type: "datetime2",
-                nullable: false,
-                defaultValue: new DateTime(1, 1, 1, 0, 0, 0, 0, DateTimeKind.Unspecified));
-
-            migrationBuilder.CreateTable(
-                name: "Operations",
-                columns: table => new
-                {
-                    Id = table.Column<string>(type: "nvarchar(450)", nullable: false),
-                    Type = table.Column<string>(type: "nvarchar(max)", nullable: false),
-                    InitiatorId = table.Column<string>(type: "nvarchar(max)", nullable: false),
-                    StartedAt = table.Column<DateTime>(type: "datetime2", nullable: false),
-                    EndedAt = table.Column<DateTime>(type: "datetime2", nullable: true),
-                    MessageGuid = table.Column<string>(type: "nvarchar(max)", nullable: false)
-                },
-                constraints: table =>
-                {
-                    table.PrimaryKey("PK_Operations", x => x.Id);
-                });
-        }
-
-        /// <inheritdoc />
-        protected override void Down(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.DropTable(
-                name: "Operations");
-
-            migrationBuilder.DropColumn(
-                name: "Name",
-                table: "Registries");
-
-            migrationBuilder.DropColumn(
-                name: "UpdatedAt",
-                table: "Registries");
-        }
-    }
-}
diff --git a/Hcs.WebApp/Data/Hcs/Migrations/20251023014411_AddOperation.Designer.cs b/Hcs.WebApp/Data/Hcs/Migrations/20251023092729_CreateHcsSchema.Designer.cs
similarity index 82%
rename from Hcs.WebApp/Data/Hcs/Migrations/20251023014411_AddOperation.Designer.cs
rename to Hcs.WebApp/Data/Hcs/Migrations/20251023092729_CreateHcsSchema.Designer.cs
index 81ce2eb..99fb413 100644
--- a/Hcs.WebApp/Data/Hcs/Migrations/20251023014411_AddOperation.Designer.cs
+++ b/Hcs.WebApp/Data/Hcs/Migrations/20251023092729_CreateHcsSchema.Designer.cs
@@ -7,8 +7,8 @@ using Microsoft.EntityFrameworkCore.Migrations;
 namespace Hcs.WebApp.Data.Hcs.Migrations
 {
     [DbContext(typeof(HcsDbContext))]
-    [Migration("20251023014411_AddOperation")]
-    partial class AddOperation
+    [Migration("20251023092729_CreateHcsSchema")]
+    public partial class CreateHcsSchema
     {
         /// <inheritdoc />
         protected override void BuildTargetModel(ModelBuilder modelBuilder)
@@ -22,8 +22,11 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
 
             modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Operation", b =>
             {
-                b.Property<string>("Id")
-                    .HasColumnType("nvarchar(450)");
+                b.Property<int>("Id")
+                    .ValueGeneratedOnAdd()
+                    .HasColumnType("int");
+
+                SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
 
                 b.Property<DateTime?>("EndedAt")
                     .HasColumnType("datetime2");
@@ -33,7 +36,6 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
                     .HasColumnType("nvarchar(max)");
 
                 b.Property<string>("MessageGuid")
-                    .IsRequired()
                     .HasColumnType("nvarchar(max)");
 
                 b.Property<DateTime>("StartedAt")
@@ -50,8 +52,9 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
 
             modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Registry", b =>
             {
-                b.Property<string>("Id")
-                    .HasColumnType("nvarchar(450)");
+                b.Property<Guid>("Id")
+                    .ValueGeneratedOnAdd()
+                    .HasColumnType("uniqueidentifier");
 
                 b.Property<bool>("IsCommon")
                     .HasColumnType("bit");
@@ -73,8 +76,9 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
 
             modelBuilder.Entity("Hcs.WebApp.Data.Hcs.RegistryElement", b =>
             {
-                b.Property<string>("Id")
-                    .HasColumnType("nvarchar(450)");
+                b.Property<Guid>("Id")
+                    .ValueGeneratedOnAdd()
+                    .HasColumnType("uniqueidentifier");
 
                 b.Property<string>("Code")
                     .IsRequired()
@@ -84,9 +88,8 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
                     .IsRequired()
                     .HasColumnType("nvarchar(max)");
 
-                b.Property<string>("RegistryId")
-                    .IsRequired()
-                    .HasColumnType("nvarchar(450)");
+                b.Property<Guid>("RegistryId")
+                    .HasColumnType("uniqueidentifier");
 
                 b.Property<string>("Xml")
                     .IsRequired()
diff --git a/Hcs.WebApp/Data/Hcs/Migrations/20251022073558_CreateHcsSchema.cs b/Hcs.WebApp/Data/Hcs/Migrations/20251023092729_CreateHcsSchema.cs
similarity index 56%
rename from Hcs.WebApp/Data/Hcs/Migrations/20251022073558_CreateHcsSchema.cs
rename to Hcs.WebApp/Data/Hcs/Migrations/20251023092729_CreateHcsSchema.cs
index b18b3d5..a87e5d5 100644
--- a/Hcs.WebApp/Data/Hcs/Migrations/20251022073558_CreateHcsSchema.cs
+++ b/Hcs.WebApp/Data/Hcs/Migrations/20251023092729_CreateHcsSchema.cs
@@ -9,12 +9,32 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
         /// <inheritdoc />
         protected override void Up(MigrationBuilder migrationBuilder)
         {
+            migrationBuilder.CreateTable(
+                name: "Operations",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "int", nullable: false)
+                        .Annotation("SqlServer:Identity", "1, 1"),
+                    Type = table.Column<string>(type: "nvarchar(max)", nullable: false),
+                    InitiatorId = table.Column<string>(type: "nvarchar(max)", nullable: false),
+                    StartedAt = table.Column<DateTime>(type: "datetime2", nullable: false),
+                    EndedAt = table.Column<DateTime>(type: "datetime2", nullable: true),
+                    MessageGuid = table.Column<string>(type: "nvarchar(max)", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Operations", x => x.Id);
+                });
+
             migrationBuilder.CreateTable(
                 name: "Registries",
                 columns: table => new
                 {
-                    Id = table.Column<string>(type: "nvarchar(450)", nullable: false),
-                    Number = table.Column<int>(type: "int", nullable: false)
+                    Id = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    Number = table.Column<int>(type: "int", nullable: false),
+                    Name = table.Column<string>(type: "nvarchar(max)", nullable: false),
+                    IsCommon = table.Column<bool>(type: "bit", nullable: false),
+                    UpdatedAt = table.Column<DateTime>(type: "datetime2", nullable: false)
                 },
                 constraints: table =>
                 {
@@ -25,8 +45,8 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
                 name: "Elements",
                 columns: table => new
                 {
-                    Id = table.Column<string>(type: "nvarchar(450)", nullable: false),
-                    RegistryId = table.Column<string>(type: "nvarchar(450)", nullable: false),
+                    Id = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
+                    RegistryId = table.Column<Guid>(type: "uniqueidentifier", nullable: false),
                     Code = table.Column<string>(type: "nvarchar(max)", nullable: false),
                     GUID = table.Column<string>(type: "nvarchar(max)", nullable: false),
                     Xml = table.Column<string>(type: "nvarchar(max)", nullable: false)
@@ -54,6 +74,9 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
             migrationBuilder.DropTable(
                 name: "Elements");
 
+            migrationBuilder.DropTable(
+                name: "Operations");
+
             migrationBuilder.DropTable(
                 name: "Registries");
         }
diff --git a/Hcs.WebApp/Data/Hcs/Migrations/HcsDbContextModelSnapshot.cs b/Hcs.WebApp/Data/Hcs/Migrations/HcsDbContextModelSnapshot.cs
index 22104ab..cd65ea2 100644
--- a/Hcs.WebApp/Data/Hcs/Migrations/HcsDbContextModelSnapshot.cs
+++ b/Hcs.WebApp/Data/Hcs/Migrations/HcsDbContextModelSnapshot.cs
@@ -19,8 +19,11 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
 
             modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Operation", b =>
             {
-                b.Property<string>("Id")
-                    .HasColumnType("nvarchar(450)");
+                b.Property<int>("Id")
+                    .ValueGeneratedOnAdd()
+                    .HasColumnType("int");
+
+                SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
 
                 b.Property<DateTime?>("EndedAt")
                     .HasColumnType("datetime2");
@@ -30,7 +33,6 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
                     .HasColumnType("nvarchar(max)");
 
                 b.Property<string>("MessageGuid")
-                    .IsRequired()
                     .HasColumnType("nvarchar(max)");
 
                 b.Property<DateTime>("StartedAt")
@@ -47,8 +49,9 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
 
             modelBuilder.Entity("Hcs.WebApp.Data.Hcs.Registry", b =>
             {
-                b.Property<string>("Id")
-                    .HasColumnType("nvarchar(450)");
+                b.Property<Guid>("Id")
+                    .ValueGeneratedOnAdd()
+                    .HasColumnType("uniqueidentifier");
 
                 b.Property<bool>("IsCommon")
                     .HasColumnType("bit");
@@ -70,8 +73,9 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
 
             modelBuilder.Entity("Hcs.WebApp.Data.Hcs.RegistryElement", b =>
             {
-                b.Property<string>("Id")
-                    .HasColumnType("nvarchar(450)");
+                b.Property<Guid>("Id")
+                    .ValueGeneratedOnAdd()
+                    .HasColumnType("uniqueidentifier");
 
                 b.Property<string>("Code")
                     .IsRequired()
@@ -81,9 +85,8 @@ namespace Hcs.WebApp.Data.Hcs.Migrations
                     .IsRequired()
                     .HasColumnType("nvarchar(max)");
 
-                b.Property<string>("RegistryId")
-                    .IsRequired()
-                    .HasColumnType("nvarchar(450)");
+                b.Property<Guid>("RegistryId")
+                    .HasColumnType("uniqueidentifier");
 
                 b.Property<string>("Xml")
                     .IsRequired()
diff --git a/Hcs.WebApp/Data/Hcs/Operation.cs b/Hcs.WebApp/Data/Hcs/Operation.cs
index 593721f..299c105 100644
--- a/Hcs.WebApp/Data/Hcs/Operation.cs
+++ b/Hcs.WebApp/Data/Hcs/Operation.cs
@@ -9,7 +9,7 @@ namespace Hcs.WebApp.Data.Hcs
             Nsi_15_7_0_1_ExportAllRegistryElements
         }
 
-        public string Id { get; set; }
+        public int Id { get; set; }
 
         public OperationType Type { get; set; }
 
@@ -19,7 +19,7 @@ namespace Hcs.WebApp.Data.Hcs
 
         public DateTime? EndedAt { get; set; }
 
-        public string MessageGuid { get; set; }
+        public string? MessageGuid { get; set; }
 
         [NotMapped]
         public bool Completed => EndedAt.HasValue;
diff --git a/Hcs.WebApp/Data/Hcs/Registry.cs b/Hcs.WebApp/Data/Hcs/Registry.cs
index 6ba1f06..a2fdf84 100644
--- a/Hcs.WebApp/Data/Hcs/Registry.cs
+++ b/Hcs.WebApp/Data/Hcs/Registry.cs
@@ -2,7 +2,7 @@
 {
     public class Registry
     {
-        public string Id { get; set; }
+        public Guid Id { get; set; }
 
         public int Number { get; set; }
 
diff --git a/Hcs.WebApp/Data/Hcs/RegistryElement.cs b/Hcs.WebApp/Data/Hcs/RegistryElement.cs
index cb9bd65..0b294d4 100644
--- a/Hcs.WebApp/Data/Hcs/RegistryElement.cs
+++ b/Hcs.WebApp/Data/Hcs/RegistryElement.cs
@@ -2,9 +2,9 @@
 {
     public class RegistryElement
     {
-        public string Id { get; set; }
+        public Guid Id { get; set; }
 
-        public string RegistryId { get; set; }
+        public Guid RegistryId { get; set; }
 
         public virtual Registry Registry { get; set; } = null!;