diff --git a/src/models/layerMetadata/layerMetadata.ts b/src/models/layerMetadata/layerMetadata.ts
index 3333b4d..f5777ff 100644
--- a/src/models/layerMetadata/layerMetadata.ts
+++ b/src/models/layerMetadata/layerMetadata.ts
@@ -981,7 +981,7 @@ export class LayerMetadata implements ILayerMetadata, IMetadataCommonModel {
     mappingType: TsTypes.NUMBER,
   })
   @graphql({
-    nullable: false, //keep it true like in max?
+    nullable: true,
   })
   @fieldConfig({
     category: FieldCategory.MAIN, // is it required?
diff --git a/src/models/polygonParts/polygonPartRecord.ts b/src/models/polygonParts/polygonPartRecord.ts
index b54cc0b..d4eeb4e 100644
--- a/src/models/polygonParts/polygonPartRecord.ts
+++ b/src/models/polygonParts/polygonPartRecord.ts
@@ -23,7 +23,7 @@ interface IPropPYCSWMapping extends IPYCSWMapping {
 
 const POLYGON_PARTS_KEYS = keys<IPolygonPart>();
 const POLYGON_PARTS_SERVED_KEYS =
-  keys<Omit<IPolygonPart, 'productId' | 'productType' | 'id' | 'catalogId' | 'productVersion' | 'ingestionDateUTC'>>();
+  keys<Omit<IPolygonPart, 'productId' | 'productType' | 'id' | 'catalogId' | 'productVersion' | 'ingestionDateUTC' | 'partId'>>();
 
 @DBEntity({
   table: 'records',
@@ -79,6 +79,13 @@ export class PolygonPartRecord implements IPolygonPart, IOrmCatalog {
   @graphql()
   @fieldConfig({
     category: FieldCategory.MAIN,
+    infoMsgCode: ['info-general-tooltip.required'],
+    validation: [
+      {
+        errorMsgCode: 'validation-general.required',
+        required: true,
+      },
+    ],
   })
   //#endregion
   public sourceName!: string;