diff --git a/src/controllers/syncController.ts b/src/controllers/syncController.ts
index 44ba41a..fdb7e8c 100644
--- a/src/controllers/syncController.ts
+++ b/src/controllers/syncController.ts
@@ -144,7 +144,9 @@ async function processDatabaseSync(database: any) {
 
       for (const op of ops) {
         const existData = existingRecords.find(
-          (record) => record.c_invoice_id === op.c_invoice_id
+          (record) =>
+            JSON.stringify(record.c_invoice_id) ===
+            JSON.stringify(op.c_invoice_id)
         );
         const existingId = existData ? existData.id : null;
         if (existingId) {