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 8216a9e7259..3d6d03f7380 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
@@ -258,6 +258,7 @@ 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