diff --git a/CHANGELOG.md b/CHANGELOG.md
index d2a15a33f..65053097f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## Next release
 
 - Fix a bug: missing payment transfer journal code in accouting line
+- Fix a bug: unable to sync iCalendar correctly
 - improvement: add settlement by transfer/check to invoice paiement info
 
 ## v6.3.12 2024 February 12
diff --git a/app/services/i_calendar_import_service.rb b/app/services/i_calendar_import_service.rb
index 2664436bd..3f3edf6e1 100644
--- a/app/services/i_calendar_import_service.rb
+++ b/app/services/i_calendar_import_service.rb
@@ -18,7 +18,7 @@ class ICalendarImportService
       cal.events.each do |evt|
         uids.push(evt.uid.to_s)
         ICalendarEvent.update_or_create_by(
-          { uid: evt.uid.to_s },
+          { uid: evt.uid.to_s, i_calendar_id: i_calendar_id},
           {
             dtstart: evt.dtstart,
             dtend: evt.dtend,