fix: wrapper element related

Author: mateusz-kleszcz

package.json

@@ -1,6 +1,6 @@
 {
   "name": "strapi-plugin-navigation",
-  "version": "3.3.4",
+  "version": "3.3.5-beta.1",
   "description": "Strapi - Navigation plugin",
   "strapi": {
     "name": "navigation",

server/src/content-types/navigation-item/schema.ts

@@ -75,7 +75,7 @@ export default {
     related: {
       type: 'relation',
       relation: 'morphToMany',
-      required: true,
+      required: false,
       configurable: false,
     },
     parent: {

server/src/utils/migration.ts

@@ -7,6 +7,9 @@ export const removeNavigationsWithoutDefaultLocale = async (context: { strapi: C
     limit: Number.MAX_SAFE_INTEGER,
   });
   const defaultLocale = await context.strapi.plugin('i18n').service('locales').getDefaultLocale();
+  if (!defaultLocale) {
+    return;
+  }
   await Promise.all(
     allNavigations.map(async (navigation) => {
       const root = allNavigations.find(