diff --git a/apps/dav/lib/CalDAV/CalDavBackend.php b/apps/dav/lib/CalDAV/CalDavBackend.php
index c7a57cf57286d..96ffe81e4a3de 100644
--- a/apps/dav/lib/CalDAV/CalDavBackend.php
+++ b/apps/dav/lib/CalDAV/CalDavBackend.php
@@ -3690,7 +3690,6 @@ public function updateProperties($calendarId, $objectUri, $calendarData, $calend
 						if (!$this->db->supports4ByteText()) {
 							$value = preg_replace('/[\x{10000}-\x{10FFFF}]/u', "\xEF\xBF\xBD", $value);
 						}
-						$value = mb_strcut($value, 0, 254);
 
 						$query->setParameter('name', $property->name);
 						$query->setParameter('parameter', null);
@@ -3705,7 +3704,7 @@ public function updateProperties($calendarId, $objectUri, $calendarData, $calend
 						foreach ($parameters as $key => $value) {
 							if (in_array($key, $indexedParametersForProperty)) {
 								// is this a shitty db?
-								if ($this->db->supports4ByteText()) {
+								if (!$this->db->supports4ByteText()) {
 									$value = preg_replace('/[\x{10000}-\x{10FFFF}]/u', "\xEF\xBF\xBD", $value);
 								}