As already suggested, you need to check with your FI guys. The reason for the issue is if you define document splitting criteria based on Profit Center and if your billing document contains multiple line items with different profit center, this type of error will come. So first check whether the Accounting Document has been posted correctly.
To check this, go to IMG Path -- Financial Accounting (New) --> General Ledger Accounting (New) --> Document Splitting --> Define Document Splitting Characteristics for General Ledger
Do the necessary configurational changes, if necessary, in consultation with your FI guys.
G. Lakshmipathi