error message " A requirement for credit balance is selected for account xxxx, but this is violated by voucher 1,026,070.00." while posting JV

Dear all,

General Ledger <<  Journals << General journal

When I’m posting Jv its prompting the below message

Ø A requirement for credit balance is selected for account BLC20000,, but this is violated by voucher 1,026,070.00.

Ø Posting has been canceled.

While checking the journal  line ,it seems everything  fine.

Could  you please suggest me why its prompting the error msg.

Thanks,

Krishna