修改migration rollback

extend/catcher/command/MigrateRollbackCommand.php

@@ -105,6 +105,9 @@ EOT
       $versionLog = $this->getVersionLog();
       $versions = array_keys($versionLog);
 
+      if ($version) {
+          $this->executeMigration($migrations[$version], MigrationInterface::DOWN);
+      } else {
           foreach ($migrations as $key => $migration) {
               if (in_array($key, $versions)) {
                   $this->executeMigration($migration, MigrationInterface::DOWN);
@@ -112,3 +115,4 @@ EOT
           }
       }
   }
+}