IdStory Identity Manager

After some candidate for a task the participant for same user is created for whole process. This participant remains in DB after conversion user name to UUID.

I tried to delete participant by official activiti service (CandidateToUuidEventListener), but it doesn't work. May be different phase of process/task live cycle should be used.

    try {
        runtimeService.deleteUserIdentityLink(processInstance.getId(), user, IdentityLinkType.PARTICIPANT);
        // Candidates on tasks are added as prticipant (with username) on process too. We have to delete them too.
        runtimeService.deleteParticipantUser(processInstance.getId(), user);
    } catch (ActivitiObjectNotFoundException ex) {
        // Participant was not found, no problem.
        log.warn("CandidateToUiidEventListener - participant was not found [{}] in the process [{}]", user, processInstance.getId(), ex);
    }