diff --git a/calendar/js/app.js b/calendar/js/app.js
index a2bba0e071..3623a76488 100644
--- a/calendar/js/app.js
+++ b/calendar/js/app.js
@@ -580,6 +580,8 @@ var CalendarApp = /** @class */ (function (_super) {
         }
         // Ask for the real data
         egw.json("calendar.calendar_ui.ajax_get", [[pushData.id]], function (data) {
+            if (data && data.data && data.data.data)
+                return;
             var unknown = (typeof egw.dataGetUIDdata(data.uid) === "undefined");
             // Store it, which will call all registered listeners
             egw.dataStoreUID(data.uid, data.data);
diff --git a/calendar/js/app.ts b/calendar/js/app.ts
index fb7d455c45..638a9e6b64 100644
--- a/calendar/js/app.ts
+++ b/calendar/js/app.ts
@@ -522,6 +522,8 @@ class CalendarApp extends EgwApp
 
 		// Ask for the real data
 		egw.json("calendar.calendar_ui.ajax_get", [[pushData.id]], function(data) {
+			if(data && data.data && data.data.data) return;
+
 			let unknown = (typeof egw.dataGetUIDdata(data.uid) === "undefined");
 			// Store it, which will call all registered listeners
 			egw.dataStoreUID(data.uid, data.data);