| B | ↘ | C | NotificationService got worse |
| ⇢ | A | EventController::evaluateEventPreviewSetting() added | |
| ⇢ | A | NotificationService::getTargetLinkAction() added | |
| ⇢ | A | EventController::verifyCancelRegistrationAction() added | |
| ⇢ | A | EventController::verifyConfirmRegistrationAction() added | |
| ⇢ | A | Event::getAllowRegistrationUntilEnddate() added | |
| ⇢ | A | Event::setAllowRegistrationUntilEnddate() added | |
| C | ↘ | D | RegistrationService::checkRegistrationSuccess() got worse |
| C | ↘ | D | Event::getRegistrationPossible() got worse |