Payment Amount should not exceed the Outstanding Liability While Offset Liability in GSTR3B

While doing Offset Liability the response says Payment Amount should not exceed the Outstanding Liability. I got the GSTR3B summary which has Supply details of IGST=319995.88 rupees, ITC =0(since no purchase) and the Net tax payable is rounded to 319996 rupees. No intrest and no Late Fee.Sufficient Amount remains in my Cash Ledger At the time of offseting liability.Can anyone help?