Add a key to the insert because the code has a meltdown otherwise...

Sources/Actions/Admin/Reactions.php

@@ -215,7 +215,7 @@ public function editreactions(): void
  $do_update = true;
 
  // Insert the new reactions
- Db::$db->insert('insert', '{db_pref}reactions', ['name'], $add, []);
+ Db::$db->insert('', '{db_pref}reactions', ['name'], $add, ['id_reaction']);
  }
  }