ActiveRecord::RecordNotUnique: SQLite3::ConstraintException: UNIQUE constraint failed: custom_fields_trackers.custom_field_id, custom_fields_trackers.tracker_id: INSERT INTO "custom_fields_trackers" ("custom_field_id", "tracker_id") VALUES (?, ?)

git-svn-id: https://svn.redmine.org/redmine/trunk@17673 e93f8b46-1217-0410-a6f0-8f06a7374b81