diff --git a/frontend/src/lib/components/booking/TimeSlotPicker.svelte b/frontend/src/lib/components/booking/TimeSlotPicker.svelte
index 8681751..b464d60 100644
--- a/frontend/src/lib/components/booking/TimeSlotPicker.svelte
+++ b/frontend/src/lib/components/booking/TimeSlotPicker.svelte
@@ -52,7 +52,7 @@
 		{/if}
 
 		<div class="grid gap-2">
-			{#each groupedTimeSlots as slot (slot.startTime)}
+			{#each groupedTimeSlots as slot (slot.type + '-' + slot.startTime + '-' + slot.endTime)}
 				{#if slot.type === 'available'}
 					{@const protection = lunchProtectionStatus.get(slot.startTime)}
 					{#if protection?.isBlocked}