diff --git a/Kyoo.Common/Models/Collection.cs b/Kyoo.Common/Models/Collection.cs
index ea4430d1..ca1cf29c 100644
--- a/Kyoo.Common/Models/Collection.cs
+++ b/Kyoo.Common/Models/Collection.cs
@@ -48,7 +48,7 @@ namespace Kyoo.Models
 				Overview = collection.Overview;
 			if (ImgPrimary == null)
 				ImgPrimary = collection.ImgPrimary;
-			Shows = Shows == null ? collection.Shows : Shows.Concat(collection.Shows);
+			Shows = Utility.MergeLists(Shows, collection.Shows, (x, y) => x.Slug == y.Slug);
 			return this;
 		}
 	}
diff --git a/Kyoo.Common/Models/Show.cs b/Kyoo.Common/Models/Show.cs
index ff264bb9..28c31eaa 100644
--- a/Kyoo.Common/Models/Show.cs
+++ b/Kyoo.Common/Models/Show.cs
@@ -109,8 +109,8 @@ namespace Kyoo.Models
 				ID = other.ID;
 			Slug ??= other.Slug;
 			Title ??= other.Title;
-			Aliases = Aliases == null ? other.Aliases : Aliases.Concat(other.Aliases).ToArray();
-			Genres = Genres == null ? other.Genres : Genres.Concat(other.Genres);
+			Aliases = Utility.MergeLists(Aliases, other.Aliases).ToArray();
+			Genres = Utility.MergeLists(Genres, other.Genres, (x, y) => x.Slug == y.Slug);
 			Path ??= other.Path;
 			Overview ??= other.Overview;
 			TrailerUrl ??= other.TrailerUrl;
@@ -121,6 +121,8 @@ namespace Kyoo.Models
 			ImgThumb ??= other.ImgThumb;
 			ImgLogo ??= other.ImgLogo;
 			ImgBackdrop ??= other.ImgBackdrop;
+			if (other.Studio != null)
+				Studio ??= other.Studio;
 			ExternalIDs = string.Join('|', ExternalIDs, other.ExternalIDs);
 			return this;
 		}
diff --git a/Kyoo.Common/Utility.cs b/Kyoo.Common/Utility.cs
index 8e1e290f..9cabbd5a 100644
--- a/Kyoo.Common/Utility.cs
+++ b/Kyoo.Common/Utility.cs
@@ -1,3 +1,7 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
 using System.Text.RegularExpressions;
 using Kyoo.Models;
 
@@ -58,5 +62,17 @@ namespace Kyoo
 					break;
 			}
 		}
+
+		public static IEnumerable<T> MergeLists<T>(IEnumerable<T> first, IEnumerable<T> second, Func<T, T, bool> isEqual = null)
+		{
+			if (first == null)
+				return second;
+			if (second == null)
+				return first;
+			List<T> list = first.ToList();
+			if (isEqual == null)
+				isEqual = (x, y) => x.Equals(y);
+			return list.Concat(second.Where(x => !list.Any(y => isEqual(x, y))));
+		}
 	}
 }
\ No newline at end of file
diff --git a/Kyoo/Kyoo.csproj b/Kyoo/Kyoo.csproj
index 86d6bde7..947871b7 100644
--- a/Kyoo/Kyoo.csproj
+++ b/Kyoo/Kyoo.csproj
@@ -16,6 +16,10 @@
 		<StartupObject>Kyoo.Program</StartupObject>
 	</PropertyGroup>
 
+	<PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
+	  <OutputPath>bin/Release/</OutputPath>
+	</PropertyGroup>
+
 	<ItemGroup>
 		<PackageReference Include="IdentityServer4" Version="3.1.2" />
 		<PackageReference Include="IdentityServer4.AspNetIdentity" Version="3.1.2" />