1 files changed, 6 insertions, 0 deletions
diff --git a/lib/vendor-document-list/plant/document-stages-service.ts b/lib/vendor-document-list/plant/document-stages-service.ts
index 98eb6f8b..5f803104 100644
--- a/lib/vendor-document-list/plant/document-stages-service.ts
+++ b/lib/vendor-document-list/plant/document-stages-service.ts
@@ -976,6 +976,12 @@ export async function createDocument(data: CreateDocumentData) {
     }
   } catch (error) {
     console.error("문서 생성 실패:", error)
+
+    // PostgreSQL unique constraint 위반 에러 처리
+    if (error instanceof Error && error.message.includes('duplicate key value violates unique constraint "unique_project_vendor_doc"')) {
+      return { success: false, error: "해당 CPY Project Document Number에 대해 이미 문서가 존재합니다." }
+    }
+
     return { success: false, error: "문서 생성 중 오류가 발생했습니다." }
   }
 }