Drop tables that may exist in down methods

database/migrations/2012_12_06_225929_migration_cartalyst_sentry_install_groups.php

@@ -46,5 +46,6 @@ class MigrationCartalystSentryInstallGroups extends Migration
     {
         // See 2014_11_04_231416_update_group_field_for_reporting.php and 2019_06_12_184327_rename_groups_table.php
         Schema::dropIfExists('permission_groups');
+        Schema::dropIfExists('groups');
     }
 }

database/migrations/2013_11_25_031458_create_license_seats_table.php

@@ -31,6 +31,6 @@ class CreateLicenseSeatsTable extends Migration
      */
     public function down()
     {
-        //
+        Schema::dropIfExists('license_seats');
     }
 }