diff --git a/erpnext/accounts/doctype/pos_invoice_merge_log/pos_invoice_merge_log.py b/erpnext/accounts/doctype/pos_invoice_merge_log/pos_invoice_merge_log.py
index 90eb1279c5c..e31504bf8eb 100644
--- a/erpnext/accounts/doctype/pos_invoice_merge_log/pos_invoice_merge_log.py
+++ b/erpnext/accounts/doctype/pos_invoice_merge_log/pos_invoice_merge_log.py
@@ -259,6 +259,7 @@ class POSInvoiceMergeLog(Document):
 				if not found:
 					tax.charge_type = "Actual"
 					tax.idx = idx
+					tax.row_id = None
 					idx += 1
 					tax.included_in_print_rate = 0
 					tax.tax_amount = tax.tax_amount_after_discount_amount