Wrong Turnover shown in GSTR 9

In one of our clients, I have booked a turnover of Rs. 66 Lacs in B2B column of GSTR1. But when i go thru in GSTR9 it shows only a turnover of Rs. 55 Lacs.

Whether any one faces the same problem as GSTR 9 will auto populate the data of GSTR 9.

So, in that case, 2hat can we do in GSTR 9.

Pls reply it on urgent basis

Thanks in Advance.