diff --git a/components/calendar/calendar-client.tsx b/components/calendar/calendar-client.tsx
index ba645dae..b1f328d6 100644
--- a/components/calendar/calendar-client.tsx
+++ b/components/calendar/calendar-client.tsx
@@ -501,9 +501,8 @@ export function CalendarClient({ initialCalendars, userId, userProfile }: Calend
       let calendarsData = [];
       let seenPrincipal = false;
       let principalCalendarId = null;
-      let eventsToMigrate = [];
 
-      // First pass: identify the principal calendar to keep and collect events
+      // First pass: identify the principal calendar and other valid calendars
       for (const cal of data) {
         if (cal.name === "Calendrier principal") {
           if (!seenPrincipal) {
@@ -511,12 +510,7 @@ export function CalendarClient({ initialCalendars, userId, userProfile }: Calend
             principalCalendarId = cal.id;
             calendarsData.push(cal);
           }
-        } else if (cal.name === "Default") {
-          // Collect events from Default calendar
-          if (cal.events && cal.events.length > 0) {
-            eventsToMigrate.push(...cal.events);
-          }
-        } else {
+        } else if (cal.name !== "Default") {
           calendarsData.push(cal);
         }
       }
@@ -543,53 +537,36 @@ export function CalendarClient({ initialCalendars, userId, userProfile }: Calend
         }
       }
 
-      // Migrate events from Default calendar to Principal calendar
-      if (eventsToMigrate.length > 0 && principalCalendarId) {
-        console.log("Migrating events to principal calendar:", eventsToMigrate.length);
-        for (const event of eventsToMigrate) {
+      // Delete duplicate Calendrier principal and Default calendars
+      const deletePromises = data
+        .filter(cal => 
+          (cal.name === "Calendrier principal" && cal.id !== principalCalendarId) || 
+          cal.name === "Default"
+        )
+        .map(async (cal) => {
           try {
-            const response = await fetch("/api/events", {
-              method: "POST",
+            const response = await fetch(`/api/calendars/${cal.id}`, {
+              method: "DELETE",
               headers: {
                 "Content-Type": "application/json",
               },
-              body: JSON.stringify({
-                ...event,
-                calendarId: principalCalendarId,
-              }),
             });
-            if (response.ok) {
-              const newEvent = await response.json();
-              // Add the migrated event to the principal calendar
-              calendarsData = calendarsData.map(cal => {
-                if (cal.id === principalCalendarId) {
-                  return {
-                    ...cal,
-                    events: [...(cal.events || []), newEvent]
-                  };
-                }
-                return cal;
-              });
+            if (!response.ok) {
+              console.error(`Failed to delete calendar ${cal.id}: ${response.status}`);
             }
-          } catch (error) {
-            console.error("Error migrating event:", error);
-          }
-        }
-      }
-
-      // Delete duplicate Calendrier principal and Default calendars
-      for (const cal of data) {
-        if ((cal.name === "Calendrier principal" && cal.id !== principalCalendarId) || 
-            cal.name === "Default") {
-          try {
-            await fetch(`/api/calendars/${cal.id}`, {
-              method: "DELETE",
-            });
           } catch (error) {
             console.error("Error deleting calendar:", error);
           }
-        }
-      }
+        });
+
+      await Promise.all(deletePromises);
+
+      // Sort calendars to ensure Calendrier principal is first
+      calendarsData.sort((a, b) => {
+        if (a.name === "Calendrier principal") return -1;
+        if (b.name === "Calendrier principal") return 1;
+        return new Date(b.createdAt).getTime() - new Date(a.createdAt).getTime();
+      });
 
       // Ensure events array exists for each calendar and convert dates
       const calendarsWithEvents = calendarsData.map((cal: Calendar & { events: Event[] }) => ({