Adding a user to a group using "Groups and roles" with trustMode fails

An error is showing up:

Error: Undefined attribute type - attribute: trustMode (trustMode: attribute type undefined, while operating on 'cn=testgroup,ou=groups,dc=test,dc=domain,dc=com'...)

(from redmine: issue id 4453, created on 2016-01-11, closed on 2016-01-18)

• Relations:
  • copied_to #4452 (closed)
• Custom Fields:
  • Bug in version: 1.0.9.1