Wrong value on automatic clearing item 1292000 in AR AP Elimination

Dear All,

I am facing problem in AR/AP Elimnination.

I have done AR AP Elimination for 1st and 2nd Period with no Errors.

WHile doing 3rd Period of ARp/AP Elimination, I am getting the error as "Wrong value on automatic clearing item 1292000"

This Clearing Item is basically the Item configured in DOcument Type as Clearing Item for Consolidation Unit.

1) What could be the reason of having this error

2) Is it necessary of Clearing Item configured in Document Type Should be Always Zero"

Regards

Ritesh