Failing master: migration:path-mysql

The build migration:path-mysql is failing due to MigrateIssuesToGhostUser migration. Migration spec or db:migrate:reset-mysql are ok.

Problematic build: https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/31484051

undefined local variable or method `parent_id' for #<Namespace:0x00000006bdc8c8>
Did you mean?  parent
               parent=
/builds/gitlab-org/gitlab-ee/vendor/ruby/2.3.0/gems/activemodel-4.2.8/lib/active_model/attribute_methods.rb:433:in `method_missing'

/cc @rymai