diff --git a/src/controllers/syncController.ts b/src/controllers/syncController.ts
index c57ea3d..44ba41a 100644
--- a/src/controllers/syncController.ts
+++ b/src/controllers/syncController.ts
@@ -142,12 +142,11 @@ async function processDatabaseSync(database: any) {
         select: { id: true, c_invoice_id: true },
       });
 
-      const existingMap = new Map(
-        existingRecords.map((record) => [record.c_invoice_id, record.id])
-      );
-
       for (const op of ops) {
-        const existingId = existingMap.get(op.c_invoice_id);
+        const existData = existingRecords.find(
+          (record) => record.c_invoice_id === op.c_invoice_id
+        );
+        const existingId = existData ? existData.id : null;
         if (existingId) {
           transactions.push(
             db.rv_openitem.update({