Balancing field "Business Area" in line item 023 not filled

Hi Gurus ,

We are facing a different kind of problem in SAP.

We have created some Imprest Entries in SAP via F-02. Total Number of Line Items within the entry is 22.

Instead of Posting the document we parked the document to get it approve from Higher authority.

At the time of posting the system is throwing the error :

" Balancing field "Business Area" in line item 023 not filled"

My Question is If there are 22 Line items in Entry then why system is showing us the error related to line item no 23.

Your Suggestions will be highly appreciated.

Regards

Honey