Requisitions with multiple distributions - how to avoid zero percent lines?

Hi,

We are using 12.2.5.

We are experiencing problems where some users raise requisitions and they split-code a distribution, but leave Distribution 1 with a 100% value, and Dist 2 with a Zero percent value:

That then filters up to the PO - e.g.

That then causes problems with the AP invoice, because when we try to Validate it, it causes this error:

This issue is covered here:

R12: AP: Invoice Validation Ends with Unexpected Error ORA-01476: Divisor Is Equal To Zero (Doc ID 2221351.1)

However - I wondered if anyone is aware of anything that can be done in iProc to provide additional validation to stop users from sending requsitiions for approval which contain zero percent distributions?