Impossible to approve Batch Master Record due to missing UD on Inspection Lot 04

Dear Experts,

I'm facing a strange system behavior while trying to approve BMR before releasing goods.

Here's my case :

1. 1. Release of process Order. At this stage, batch is generated and IL 03 and 04 are created.
2. 2. Results recording on IL 03 and usage decision on inspection lot 03 (System status goes to UD / LOLK)
3. 3. Goods receipt on process order
4. 4. Creation of BMR from COEBR
5. 5. Process order technical completion (system status set to TECO)

At the time I try to approve MBR, I get an irrelevant error message from the system saying IL 04 is missing UD...

But UD on 04 IL is supposed to take place only once batch has been validated and archived....

Any idea ?

In attachement a copy of the error message.