ee/spec/services/ee/issuable/clone/attributes_rewriter_spec.rb is failing on master

 6) Issuable::Clone::AttributesRewriter when a new object is a group entity setting milestones copies the milestone when old issue milestone is a group milestone
     Failure/Error: project_id == milestone&.project_id || project.ancestors_upto.compact.include?(milestone&.group)

     NameError:
       undefined local variable or method `project_id' for #<Epic id:104 group187&1>
       Did you mean?  project
                      object_id
     # ./app/models/concerns/issuable.rb:124:in `milestone_available?'
     # ./app/models/concerns/issuable.rb:130:in `milestone_is_valid'
     # ./app/services/issuable/clone/attributes_rewriter.rb:13:in `execute'
     # ./ee/spec/services/ee/issuable/clone/attributes_rewriter_spec.rb:45:in `block (4 levels) in <top (required)>'

(https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/171854966)