Source: Commissariat a l Energie Atomique-CEA ( Benoit Maggi)
The specification says:
• principal : Element 
Properties to which AdjunctProperty applied must have the same name as the principal.
A name isn't mandatory for an UML Element.
=> principal type should be NamedElement
Reported: SysML 1.4 — Thu, 4 Aug 2016 14:25 GMT
Disposition: Resolved — SysML 1.6
AdjunctProperty principal should be a NamedElement
Change constraint  to address none NamedElement,
remove list of covered elements in attribute description because it is covered in the constraints
Updated: Mon, 1 Apr 2019 18:17 GMT