fix: add property type definition control back

npm/ng-packs/packages/schematics/src/utils/model.ts

@@ -70,7 +70,8 @@ export function createImportRefsToModelReducer(params: ModelGeneratorParams) {
         _interface.properties.forEach(prop => {
           prop.refs.forEach(ref => {
             const propType = types[ref];
-            if (propType?.isEnum) toBeImported.push({ type: ref, isEnum: true });
+            if (!propType) return;
+            if (propType.isEnum) toBeImported.push({ type: ref, isEnum: true });
             else if (parseNamespace(solution, ref) !== model.namespace)
               toBeImported.push({ type: ref, isEnum: false });
           });