Hello everyone , 

Using app10 revision 10.

I create  2 new Lu.

One of the Lu (Y) uses a reference association to the the other one (X)

I then added a persistant reference Custom field in the customer order line to the LU define here as ‘Y’.

When trying to delete the Customer order line i get a reference design error: 

I changed the association delete  Delete behavior = NoCheck without any result.

I tried to refresh Dictionary/reference cache without any sucess .

I Deleted the custom field and the error is still present.

I was able to create the same scenario with Quotation line without any issue.

Any idea where to start identifying the error here ?