gstr 1A and 2A

Any one help me... i have filed my GSTR 1 - B2B Sales as a B2C Sales (instead of showing in 4A, 4B, 4C, 6B, 6C - B2B Invoices i have shown in  7 - B2C (Others) ) now the Bill has arised in GSTR 1 A. If i accept it means my liablity will increase and  i need to pay double time tax for same bill.  is there any other option to retify it?

DEAR  . . . Aman Chawla , 

GSTR 1A IS NEED TO FILE (MANDATORY)

BUT GSTR 2A IS ONLY VIEW RETURN FOR PREPARING GSTR 2

if i accept means my liablity increase? i need to pay double time tax for the same bill arrised by me? (one i already paid by showing in B2C sales and another while accepting the bill from my party request in GSTR 1 A...

Yes sir... i have shown my bill number in document column correctly.. only one mistake i have made - not mention the party gstnumber and shown in unregistered sales