prevent null values setState

src/pages/Dictionaries.tsx

@@ -72,16 +72,20 @@ const Dictionaries = () => {
   return (
     <div>
       <h3>Справочники</h3>
-      <Select 
-        data={dictionaryOptions} 
-        value={selectedDictionary} 
-        onChange={setSelectedDictionary} 
-        allowDeselect={false} 
-        searchable 
+      <Select
+        data={dictionaryOptions}
+        value={selectedDictionary}
+        onChange={(value) => {
+          if (value) {
+            setSelectedDictionary(value)
+          }
+        }}
+        allowDeselect={false}
+        searchable
         nothingFoundMessage="Не найдено..."
         maxDropdownHeight={300}
-     /><br/>
-      <Button onClick={() => { setCurrentItem(null); setModalOpened(true); }}>Добавить</Button><br/><br/>
+      /><br />
+      <Button onClick={() => { setCurrentItem(null); setModalOpened(true); }}>Добавить</Button><br /><br />
 
       <DictionaryTable
         data={data}