diff --git a/app/Services/CommonService.php b/app/Services/CommonService.php
index c1de3e8..1bb00d9 100644
--- a/app/Services/CommonService.php
+++ b/app/Services/CommonService.php
@@ -34,11 +34,18 @@ abstract class CommonService
     final protected function dbTransaction(callable $callback, string $functionName = ''): mixed
     {
         $db = \Config\Database::connect();
+
         try {
             $db->transException(true)->transStart();
             $result = $callback($db);
             $db->transComplete();
             return $result;
+
+        } catch (FormValidationException $e) {
+            // ✅ 검증 에러는 감싸지 말고 그대로 던져야 Ajax가 422 + errors 받음
+            $db->transRollback();
+            throw $e;
+
         } catch (DatabaseException $e) {
             $errorMessage = sprintf(
                 "\n----[%s]에서 트랜잭션 실패: DB 오류----\n%s\n%s\n------------------------------\n",
@@ -48,8 +55,10 @@ abstract class CommonService
             );
             log_message('error', $errorMessage);
             throw new RuntimeException($errorMessage, $e->getCode(), $e);
+
         } catch (\Throwable $e) {
             $db->transRollback();
+            // ✅ 여기서 FormValidationException까지 RuntimeException으로 바뀌던게 문제였음
             throw new RuntimeException($e->getMessage(), $e->getCode(), $e);
         }
     }