diff --git a/backend/app/service/backup_app.go b/backend/app/service/backup_app.go
index ec00836d3..412d8f3fb 100644
--- a/backend/app/service/backup_app.go
+++ b/backend/app/service/backup_app.go
@@ -208,10 +208,18 @@ func handleAppRecover(install *model.AppInstall, recoverFile string, isRollback
 		}
 	}
 
+	appDir := install.GetPath()
+	backPath := fmt.Sprintf("%s_bak", appDir)
+	_ = fileOp.Rename(appDir, backPath)
+	_ = fileOp.CreateDir(appDir, 0755)
+
 	if err := handleUnTar(tmpPath+"/app.tar.gz", fmt.Sprintf("%s/%s", constant.AppInstallDir, install.App.Key)); err != nil {
 		global.LOG.Errorf("handle recover from app.tar.gz failed, err: %v", err)
+		_ = fileOp.DeleteDir(appDir)
+		_ = fileOp.Rename(backPath, appDir)
 		return err
 	}
+	_ = fileOp.DeleteDir(backPath)
 
 	if len(newEnvFile) != 0 {
 		envPath := fmt.Sprintf("%s/%s/%s/.env", constant.AppInstallDir, install.App.Key, install.Name)
@@ -233,6 +241,7 @@ func handleAppRecover(install *model.AppInstall, recoverFile string, isRollback
 		return err
 	}
 	isOk = true
+
 	return nil
 }
 
diff --git a/frontend/src/global/form-rules.ts b/frontend/src/global/form-rules.ts
index 767c94004..0e7e2d665 100644
--- a/frontend/src/global/form-rules.ts
+++ b/frontend/src/global/form-rules.ts
@@ -124,7 +124,7 @@ const checkSimpleName = (rule: any, value: any, callback: any) => {
     if (value === '' || typeof value === 'undefined' || value == null) {
         callback(new Error(i18n.global.t('commons.rule.simpleName')));
     } else {
-        const reg = /^[a-zA-Z0-9]{1}[a-zA-Z0-9_]{0,30}$/;
+        const reg = /^[a-zA-Z0-9]{1}[a-zA-Z0-9_]{1,29}$/;
         if (!reg.test(value) && value !== '') {
             callback(new Error(i18n.global.t('commons.rule.simpleName')));
         } else {