diff --git a/lib/private/Group/Manager.php b/lib/private/Group/Manager.php
index 2b6eb70502b45..f08814d0b54ee 100644
--- a/lib/private/Group/Manager.php
+++ b/lib/private/Group/Manager.php
@@ -100,20 +100,20 @@ public function __construct(\OC\User\Manager $userManager,
 
 		$cachedGroups = &$this->cachedGroups;
 		$cachedUserGroups = &$this->cachedUserGroups;
-		$this->listen('\OC\Group', 'postDelete', function ($group) use (&$cachedGroups, &$cachedUserGroups) {
+		$this->listen('\OC\Group', 'preDelete', function ($group) use (&$cachedGroups, &$cachedUserGroups) {
 			/**
 			 * @var \OC\Group\Group $group
 			 */
 			unset($cachedGroups[$group->getGID()]);
 			$cachedUserGroups = [];
 		});
-		$this->listen('\OC\Group', 'postAddUser', function ($group) use (&$cachedUserGroups) {
+		$this->listen('\OC\Group', 'preAddUser', function ($group) use (&$cachedUserGroups) {
 			/**
 			 * @var \OC\Group\Group $group
 			 */
 			$cachedUserGroups = [];
 		});
-		$this->listen('\OC\Group', 'postRemoveUser', function ($group) use (&$cachedUserGroups) {
+		$this->listen('\OC\Group', 'preRemoveUser', function ($group) use (&$cachedUserGroups) {
 			/**
 			 * @var \OC\Group\Group $group
 			 */