When upgrading from 1.32 to 1.34, running update.php fails with this error:
Running .../extensions/SocialProfile/UserRelationship/maintenance/migrateOldUserRelationshipUserColumnsToActor.php... CannotCreateActorException from line 2323 of .../includes/user/User.php: Cannot create an actor for a usable name that is not an existing user: user_id=0 user_name="XXXXXXX" #0 .../extensions/SocialProfile/UserRelationship/maintenance/migrateOldUserRelationshipUserColumnsToActor.php(62): User->getActorId(Object(Wikimedia\Rdbms\MaintainableDBConnRef)) #1 .../maintenance/Maintenance.php(1746): MigrateOldUserRelationshipUserColumnsToActor->doDBUpdates() #2 .../includes/installer/DatabaseUpdater.php(1036): LoggedUpdateMaintenance->execute() #3 .../includes/installer/DatabaseUpdater.php(490): DatabaseUpdater->runMaintenance('MigrateOldUserR...', '...') #4 .../includes/installer/DatabaseUpdater.php(458): DatabaseUpdater->runUpdates(Array, true) #5 .../maintenance/update.php(205): DatabaseUpdater->doUpdates(Array) #6 .../maintenance/doMaintenance.php(99): UpdateMediaWiki->execute() #7 .../maintenance/update.php(277): require_once('...') #8 {main}
Apparently the issue is because it creates the user with user_name but doesn't populate its user_id.