Not able to delete a Definition Library

Dear ENOVIA User Community,

I am trying to delete a Definition Library using IP Classification Editor app (Classification Manager role, R2026x FD02 on-cloud)
This is the return error message:
 

I think I have already done all basic operations before deleting:

  • use Administrator credential
  • take Library ownership
  • demote and delete library classes
  • demote Library itself
     

Am I missing anything?

Tks!