defect
This is a problem when you're working in a model
#!plantuml @startuml A *-- "1..*" B : bs @enduml
and you want to delete it but keep the associated instance of B. To do this , you must detach `B from A` before deleting `A`. However, this detachment is currently not possible with a mandatory attribute (bs), since the attribute does not accept an empty value (even temporarily).
Test
- test.com.top_logic.element.meta.TestClearMandatoryAttribute.testClearAttribute()