diff --git a/frontend/src/lib/components/NewAdventure.svelte b/frontend/src/lib/components/NewAdventure.svelte
index 851a0c3..a18d80c 100644
--- a/frontend/src/lib/components/NewAdventure.svelte
+++ b/frontend/src/lib/components/NewAdventure.svelte
@@ -11,7 +11,7 @@
 
 	export let longitude: number | null = null;
 	export let latitude: number | null = null;
-	export let collection_id: number | null = null;
+	export let collection_id: string | null = null;
 
 	import MapMarker from '~icons/mdi/map-marker';
 	import Calendar from '~icons/mdi/calendar';
@@ -29,7 +29,7 @@
 	export let endDate: string | null = null;
 
 	let newAdventure: Adventure = {
-		id: NaN,
+		id: '',
 		type: type,
 		name: '',
 		location: '',
@@ -43,7 +43,7 @@
 		latitude: null,
 		longitude: null,
 		is_public: false,
-		collection: collection_id || NaN
+		collection: collection_id || ''
 	};
 
 	if (longitude && latitude) {
diff --git a/frontend/src/lib/types.ts b/frontend/src/lib/types.ts
index fa951d5..b00cf35 100644
--- a/frontend/src/lib/types.ts
+++ b/frontend/src/lib/types.ts
@@ -21,7 +21,7 @@ export type Adventure = {
 	link?: string | null;
 	image?: string | null;
 	date?: string | null; // Assuming date is a string in 'YYYY-MM-DD' format
-	collection?: number | null;
+	collection?: string | null;
 	latitude: number | null;
 	longitude: number | null;
 	is_public: boolean;
diff --git a/frontend/src/routes/adventures/+page.svelte b/frontend/src/routes/adventures/+page.svelte
index 2984dc9..5882cc5 100644
--- a/frontend/src/routes/adventures/+page.svelte
+++ b/frontend/src/routes/adventures/+page.svelte
@@ -98,7 +98,7 @@
 	let adventureToEdit: Adventure;
 	let isEditModalOpen: boolean = false;
 
-	function deleteAdventure(event: CustomEvent<number>) {
+	function deleteAdventure(event: CustomEvent<string>) {
 		adventures = adventures.filter((adventure) => adventure.id !== event.detail);
 	}
 
diff --git a/frontend/src/routes/collections/+page.svelte b/frontend/src/routes/collections/+page.svelte
index df06848..59427ff 100644
--- a/frontend/src/routes/collections/+page.svelte
+++ b/frontend/src/routes/collections/+page.svelte
@@ -66,7 +66,7 @@
 		};
 	}
 
-	function deleteCollection(event: CustomEvent<number>) {
+	function deleteCollection(event: CustomEvent<string>) {
 		collections = collections.filter((collection) => collection.id !== event.detail);
 	}
 
@@ -85,7 +85,7 @@
 	let collectionToEdit: Collection;
 	let isEditModalOpen: boolean = false;
 
-	function deleteAdventure(event: CustomEvent<number>) {
+	function deleteAdventure(event: CustomEvent<string>) {
 		collections = collections.filter((adventure) => adventure.id !== event.detail);
 	}
 
@@ -245,7 +245,7 @@
 						value="name"
 						hidden
 					/>
-					<button type="submit" class="btn btn-success btn-primary mt-4">Filter</button>
+					<button type="submit" class="btn btn-success btn-primary mt-4">Sort</button>
 				</form>
 				<div class="divider"></div>
 				<button
diff --git a/frontend/src/routes/collections/[id]/+page.svelte b/frontend/src/routes/collections/[id]/+page.svelte
index 41b1e90..3f8cb86 100644
--- a/frontend/src/routes/collections/[id]/+page.svelte
+++ b/frontend/src/routes/collections/[id]/+page.svelte
@@ -79,7 +79,7 @@
 		}
 	});
 
-	function deleteAdventure(event: CustomEvent<number>) {
+	function deleteAdventure(event: CustomEvent<string>) {
 		adventures = adventures.filter((a) => a.id !== event.detail);
 	}
 
@@ -111,7 +111,7 @@
 		}
 	}
 
-	function changeType(event: CustomEvent<number>) {
+	function changeType(event: CustomEvent<string>) {
 		adventures = adventures.map((adventure) => {
 			if (adventure.id == event.detail) {
 				if (adventure.type == 'visited') {
diff --git a/frontend/src/routes/search/+page.svelte b/frontend/src/routes/search/+page.svelte
index 2c85c9a..49a147b 100644
--- a/frontend/src/routes/search/+page.svelte
+++ b/frontend/src/routes/search/+page.svelte
@@ -10,7 +10,7 @@
 
 	export let data: PageData;
 
-	function deleteAdventure(event: CustomEvent<number>) {
+	function deleteAdventure(event: CustomEvent<string>) {
 		myAdventures = myAdventures.filter((adventure) => adventure.id !== event.detail);
 	}