Item not relevant for Billing but still exist in Billing due list VF04

Hi Experts,

I am experiencing an issue where this is an STO scenario.

The PO->DN->PGI->GR (Receiving plant) where there is no invoice required as its with the same company.

However, I can see there is one Delivery still getting reflected in VF04 due list.

Standard Delivery type NL has been used and already checked the item categoy relevance and its

maintained as J ( Relevant for deliveries across EU countries.) I dont think so this was billed earlier as I had already checked the Deliveries created with same item category for past six months and they have not been billed.

Is there any other settings that needed to be checked apart from item cateogry and verifying how the same combination of Delivery type and item category worked earlier?

IBest Regards,

Ramesh