diff --git a/api/src/controllers/seed/insert/collection.ts b/api/src/controllers/seed/insert/collection.ts
index 99890bfe..a93fa443 100644
--- a/api/src/controllers/seed/insert/collection.ts
+++ b/api/src/controllers/seed/insert/collection.ts
@@ -1,18 +1,69 @@
+import { sql } from "drizzle-orm";
+import { db } from "~/db";
+import { showTranslations, shows } from "~/db/schema";
+import { conflictUpdateAllExcept } from "~/db/utils";
 import type { SeedCollection } from "~/models/collections";
-import { insertShow } from "./shows";
+import type { SeedMovie } from "~/models/movie";
+import type { SeedSerie } from "~/models/serie";
+import { processOptImage } from "../images";
 
-export const insertCollection = async (collection?: SeedCollection) => {
+type ShowTrans = typeof showTranslations.$inferInsert;
+
+export const insertCollection = async (
+	collection: SeedCollection | undefined,
+	show: (({ kind: "movie" } & SeedMovie) | ({ kind: "serie" } & SeedSerie)) & {
+		nextRefresh: string;
+	},
+) => {
 	if (!collection) return null;
-	const { translations: colTrans, ...col } = collection;
-	// TODO: need to compute start/end year & if missing tags & genres
-	const { updated, status, ...ret } = await insertShow(
-		{
-			kind: "collection",
-			status: "unknown",
-			nextRefresh,
-			...col,
-		},
-		colTrans,
-	);
-	return ret;
+	const { translations, ...col } = collection;
+
+	return await db.transaction(async (tx) => {
+		const [ret] = await tx
+			.insert(shows)
+			.values({
+				kind: "collection",
+				status: "unknown",
+				startAir: show.kind === "movie" ? show.airDate : show.startAir,
+				endAir: show.kind === "movie" ? show.airDate : show.endAir,
+				nextRefresh: show.nextRefresh,
+				...col,
+			})
+			.onConflictDoUpdate({
+				target: shows.slug,
+				set: {
+					...conflictUpdateAllExcept(shows, [
+						"pk",
+						"id",
+						"slug",
+						"createdAt",
+						"startAir",
+						"endAir",
+					]),
+					startAir: sql`least(${shows.startAir}, excluded.start_air)`,
+					endAir: sql`greatest(${shows.endAir}, excluded.end_air)`,
+				},
+			})
+			.returning({ pk: shows.pk, id: shows.id, slug: shows.slug });
+
+		const trans: ShowTrans[] = Object.entries(translations).map(
+			([lang, tr]) => ({
+				pk: ret.pk,
+				language: lang,
+				...tr,
+				poster: processOptImage(tr.poster),
+				thumbnail: processOptImage(tr.thumbnail),
+				logo: processOptImage(tr.logo),
+				banner: processOptImage(tr.banner),
+			}),
+		);
+		await tx
+			.insert(showTranslations)
+			.values(trans)
+			.onConflictDoUpdate({
+				target: [showTranslations.pk, showTranslations.language],
+				set: conflictUpdateAllExcept(showTranslations, ["pk", "language"]),
+			});
+		return ret;
+	});
 };
diff --git a/api/src/controllers/seed/movies.ts b/api/src/controllers/seed/movies.ts
index c20188e0..968461d2 100644
--- a/api/src/controllers/seed/movies.ts
+++ b/api/src/controllers/seed/movies.ts
@@ -41,7 +41,11 @@ export const seedMovie = async (
 	const { translations, videos, collection, ...bMovie } = seed;
 	const nextRefresh = guessNextRefresh(bMovie.airDate ?? new Date());
 
-	const col = await insertCollection(collection);
+	const col = await insertCollection(collection, {
+		kind: "movie",
+		nextRefresh,
+		...seed,
+	});
 
 	const show = await insertShow(
 		{
diff --git a/api/src/controllers/seed/series.ts b/api/src/controllers/seed/series.ts
index 124d3b9c..53e9e777 100644
--- a/api/src/controllers/seed/series.ts
+++ b/api/src/controllers/seed/series.ts
@@ -68,7 +68,11 @@ export const seedSerie = async (
 	const { translations, seasons, entries, extras, collection, ...serie } = seed;
 	const nextRefresh = guessNextRefresh(serie.startAir ?? new Date());
 
-	const col = await insertCollection(collection);
+	const col = await insertCollection(collection, {
+		kind: "serie",
+		nextRefresh,
+		...seed,
+	});
 
 	const show = await insertShow(
 		{