Offset CGST or SGST/UTGST liability first with IGST credit before utilizing CGST credit

Trying to file GSTR 3b , i have ITC credit and  added cash required to pay the GST. I have IGST credit available in the credit ledger from purchase of capital goods which i cannot claim.

But when i press "make payment/post to credit ledger" i get error which says "Offset CGST or SGST/UTGST liability first with IGST credit before utilizing CGST credit"

I cannot use the IGST credit available , but the portal does not allow me to pay partly via usable ITC in credit ledger and partly with cash in cash ledger.

Please help.