code: public function up()
      {
          $prefix = \Config::get('laravel-translation-manager::config.table_prefix', '');
          Schema::table($prefix . 'ltm_user_locales', function (Blueprint $table) use ($prefix) {
              $table->dropIndex('ix_ltm_user_locales_user_id');
  
              $table->unique('user_id', 'ixk_user_id_users_id');
              $table->text('ui_settings')->nullable();
          });
      }
docs: Run the migrations.
  
  @return void