Gstr 1 invoice processed with an error

I am having difficulties in adding a sales invoice in my gstr-1, Since my gstr-1 filing of july was delayed some of the party sales invoices were already visible under the uploaded by reciver section so i accepted the invoice after verfiying them. But four of the invoces uploded by the receiver were with wrong invoice amount so i rejected the invoices but when i try to add the same invoice with the corrected invoice amount under the uploded by taxpayer section it shows an error saying the invoice is process with a error. I tried contacting the GST helepline but they were of  no help.  Kindly help me clear this issue as my gstr-1 filiing is pending.