diff --git a/lib/classes/calendar/ICalendarImport.class.php b/lib/classes/calendar/ICalendarImport.class.php
index fc026c07b10bc2ee5f7d42a13d522efb83fb89d5..6d4a2607d50f931bd7818585df1ce957d5508aec 100644
--- a/lib/classes/calendar/ICalendarImport.class.php
+++ b/lib/classes/calendar/ICalendarImport.class.php
@@ -367,7 +367,6 @@ class ICalendarImport
             $date->chdate = $date->mkdate;
         }
         $date->import_date = $this->import_time;
-        $date->unique_id = $properties['UID'];
 
         $this->setRecurrenceRule($date, $properties['RRULE']);
         $date->store();