diff --git a/lib/private/AllConfig.php b/lib/private/AllConfig.php
index bb15adf31b4f0..72af6c960a5ca 100644
--- a/lib/private/AllConfig.php
+++ b/lib/private/AllConfig.php
@@ -246,7 +246,7 @@ public function setUserValue($userId, $appName, $key, $value, $preCondition = nu
 		$userPreferences = \OCP\Server::get(IUserConfig::class);
 		if ($preCondition !== null) {
 			try {
-				if ($userPreferences->getValueMixed($userId, $appName, $key) !== (string)$preCondition) {
+				if ($userPreferences->hasKey($userId, $appName, $key) && $userPreferences->getValueMixed($userId, $appName, $key) !== (string)$preCondition) {
 					throw new PreConditionNotMetException();
 				}
 			} catch (TypeConflictException) {