Error in filing GSTR 1

I forgot to upload few outward supply invoices in GSTR 1 of F.Y. 2017-18 and the return has been filled with out those invoices and GST R 1 cannot be revised so I uploaded those invoices of F.Y. 2017-18 in 1st quarter return of F.Y. 2018-19 but when I clicked on submit button, it showed error in B2B column and I am not able to file my GST return. Please help me into this matter.