Invoice not upload in gstr1 but tax paid in gstr3b

I am file return quarterly. in last year second quarter i.e. september 2020.

i forgot to upload 3bills on a single party. but i paid tax for that in gstr3b.

that party told me about it this year in april. 

so in this years first quarter, i uploaded those bills mentioning the actual date of invoice. in gstr1

NOW, Gstr3b shows taxable amount, as it is catching both original invoice of this quarter plus those 3 invoices i uploaded.

but i have already paid tax for that.

if i change details in gstr3b, and enter actual sale taxable amount and tax of this quarter.

it shows red.

how to solve this problem.