Drupal\Core\Entity\EntityStorageException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '187c8786-e66b-41a5-b6b2-f60519ff8567' for key 'menu_link_content_field__uuid__value': INSERT INTO "menu_link_content" ("revision_id", "bundle", "uuid", "langcode") VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3); Array ( [:db_insert_placeholder_0] => [:db_insert_placeholder_1] => menu_link_content [:db_insert_placeholder_2] => 187c8786-e66b-41a5-b6b2-f60519ff8567 [:db_insert_placeholder_3] => ja ) in Drupal\Core\Entity\Sql\SqlContentEntityStorage->save() (line 817 of core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorage.php).
Active
1.0
Code
Just confirming that @venkatadapa's patch adds the appropriate sanity checking and works fine.
Marking as major, because it stops the module from working.
Marking as RTBC because I, too, can confirm the patch fixes the problem