restui.permissions.yml conflicts with rest.permissions.yml

restui.permissions.yml

administer rest resources:
  title: 'Administer rest resources'
  description: 'Configure rest resources.'
  restrict access: TRUE

rest.permissions.yml

administer rest resources:
  title: 'Administer REST resource configuration'

(This was added in #2308745: Remove rest.settings.yml, use rest_resource config entities.)

This is one of the consequences if you don't make your permissions have a module-specific name.