diff --git a/back/src/Kyoo.Core/Controllers/ThumbnailsManager.cs b/back/src/Kyoo.Core/Controllers/ThumbnailsManager.cs
index d11fd898..3c276145 100644
--- a/back/src/Kyoo.Core/Controllers/ThumbnailsManager.cs
+++ b/back/src/Kyoo.Core/Controllers/ThumbnailsManager.cs
@@ -77,18 +77,18 @@ namespace Kyoo.Core.Controllers
 				using SKCodec codec = SKCodec.Create(reader);
 				SKImageInfo info = codec.Info;
 				info.ColorType = SKColorType.Rgba8888;
-				SKBitmap bitmap = SKBitmap.Decode(codec, info);
+				using SKBitmap original = SKBitmap.Decode(codec, info);
 
-				bitmap.Resize(new SKSizeI(bitmap.Width, bitmap.Height), SKFilterQuality.High);
-				await _WriteTo(bitmap, $"{localPath}.{ImageQuality.High.ToString().ToLowerInvariant()}.jpg");
+				using SKBitmap high = original.Resize(new SKSizeI(original.Width, original.Height), SKFilterQuality.High);
+				await _WriteTo(high, $"{localPath}.{ImageQuality.High.ToString().ToLowerInvariant()}.jpg");
 
-				bitmap.Resize(new SKSizeI((int)(bitmap.Width / 1.5), (int)(bitmap.Height / 1.5)), SKFilterQuality.Medium);
-				await _WriteTo(bitmap, $"{localPath}.{ImageQuality.Medium.ToString().ToLowerInvariant()}.jpg");
+				using SKBitmap medium = high.Resize(new SKSizeI((int)(high.Width / 1.5), (int)(high.Height / 1.5)), SKFilterQuality.Medium);
+				await _WriteTo(medium, $"{localPath}.{ImageQuality.Medium.ToString().ToLowerInvariant()}.jpg");
 
-				bitmap.Resize(new SKSizeI(bitmap.Width / 2, bitmap.Height / 2), SKFilterQuality.Low);
-				await _WriteTo(bitmap, $"{localPath}.{ImageQuality.Low.ToString().ToLowerInvariant()}.jpg");
+				using SKBitmap low = medium.Resize(new SKSizeI(medium.Width / 2, medium.Height / 2), SKFilterQuality.Low);
+				await _WriteTo(low, $"{localPath}.{ImageQuality.Low.ToString().ToLowerInvariant()}.jpg");
 
-				image.Blurhash = Blurhasher.Encode(bitmap, 4, 3);
+				image.Blurhash = Blurhasher.Encode(low, 4, 3);
 			}
 			catch (Exception ex)
 			{
diff --git a/back/src/Kyoo.Postgresql/Migrations/20230806025743_items.cs b/back/src/Kyoo.Postgresql/Migrations/20230806025743_items.cs
index 85b812ff..278b0179 100644
--- a/back/src/Kyoo.Postgresql/Migrations/20230806025743_items.cs
+++ b/back/src/Kyoo.Postgresql/Migrations/20230806025743_items.cs
@@ -39,14 +39,14 @@ namespace Kyoo.Postgresql.Migrations
 			FROM shows AS s
 			UNION ALL
 			SELECT
-				m.id, m.slug, m.name, m.tagline, m.aliases, m.overview, m.tags, m.genres, m.status,
+				-m.id, m.slug, m.name, m.tagline, m.aliases, m.overview, m.tags, m.genres, m.status,
 				m.air_date as start_air, m.air_date as end_air, m.poster_source, m.poster_blurhash, m.thumbnail_source,
 				m.thumbnail_blurhash, m.logo_source, m.logo_blurhash, m.trailer, m.external_id, m.air_date, m.path,
 				'movie'::item_kind AS kind
 			FROM movies AS m
 			UNION ALL
 			SELECT
-				c.id, c.slug, c.name, NULL as tagline, NULL as alises, c.overview, NULL AS tags, NULL AS genres, 'unknown'::status AS status,
+				c.id + 10000 AS id, c.slug, c.name, NULL as tagline, NULL as alises, c.overview, NULL AS tags, NULL AS genres, 'unknown'::status AS status,
 				NULL AS start_air, NULL AS end_air, c.poster_source, c.poster_blurhash, c.thumbnail_source,
 				c.thumbnail_blurhash, c.logo_source, c.logo_blurhash, NULL as trailer, c.external_id, NULL AS air_date, NULL as path,
 				'collection'::item_kind AS kind