diff --git a/src/NzbDrone.Common/Extensions/IEnumerableExtensions.cs b/src/NzbDrone.Common/Extensions/IEnumerableExtensions.cs
index 6eb544c1da..76752f21ef 100644
--- a/src/NzbDrone.Common/Extensions/IEnumerableExtensions.cs
+++ b/src/NzbDrone.Common/Extensions/IEnumerableExtensions.cs
@@ -54,10 +54,8 @@ public static Dictionary<TKey, TItem> ToDictionaryIgnoreDuplicates<TItem, TKey>(
             foreach (var item in src)
             {
                 var key = keySelector(item);
-                if (!result.ContainsKey(key))
-                {
-                    result[key] = item;
-                }
+
+                result.TryAdd(key, item);
             }
 
             return result;
@@ -69,10 +67,9 @@ public static Dictionary<TKey, TValue> ToDictionaryIgnoreDuplicates<TItem, TKey,
             foreach (var item in src)
             {
                 var key = keySelector(item);
-                if (!result.ContainsKey(key))
-                {
-                    result[key] = valueSelector(item);
-                }
+                var value = valueSelector(item);
+
+                result.TryAdd(key, value);
             }
 
             return result;
diff --git a/src/Radarr.Api.V3/Collections/CollectionController.cs b/src/Radarr.Api.V3/Collections/CollectionController.cs
index 3478d6dd04..51b76c93de 100644
--- a/src/Radarr.Api.V3/Collections/CollectionController.cs
+++ b/src/Radarr.Api.V3/Collections/CollectionController.cs
@@ -165,7 +165,7 @@ private IEnumerable<CollectionResource> MapToResource(List<MovieCollection> coll
                 .ToDictionary(x => x.Key, x => (IEnumerable<MovieMetadata>)x);
 
             var translations = _movieTranslationService.GetAllTranslationsForLanguage(configLanguage);
-            var tdict = translations.ToDictionary(x => x.MovieMetadataId);
+            var tdict = translations.ToDictionaryIgnoreDuplicates(x => x.MovieMetadataId);
 
             foreach (var collection in collections)
             {
diff --git a/src/Radarr.Api.V3/Movies/MovieController.cs b/src/Radarr.Api.V3/Movies/MovieController.cs
index 33c35988f7..4f48fe66d4 100644
--- a/src/Radarr.Api.V3/Movies/MovieController.cs
+++ b/src/Radarr.Api.V3/Movies/MovieController.cs
@@ -150,7 +150,7 @@ public List<MovieResource> AllMovie(int? tmdbId, bool excludeLocalCovers = false
                 var translations = _movieTranslationService
                     .GetAllTranslationsForLanguage(translationLanguage);
 
-                var tdict = translations.ToDictionary(x => x.MovieMetadataId);
+                var tdict = translations.ToDictionaryIgnoreDuplicates(x => x.MovieMetadataId);
                 var sdict = movieStats.ToDictionary(x => x.MovieId);
 
                 if (!excludeLocalCovers)
diff --git a/src/Radarr.Api.V3/Movies/MovieEditorController.cs b/src/Radarr.Api.V3/Movies/MovieEditorController.cs
index d10e5b2d9e..902c224519 100644
--- a/src/Radarr.Api.V3/Movies/MovieEditorController.cs
+++ b/src/Radarr.Api.V3/Movies/MovieEditorController.cs
@@ -116,7 +116,7 @@ public IActionResult SaveAll([FromBody] MovieEditorResource resource)
             var availabilityDelay = _configService.AvailabilityDelay;
 
             var translations = _movieTranslationService.GetAllTranslationsForLanguage(configLanguage);
-            var tdict = translations.ToDictionary(x => x.MovieMetadataId);
+            var tdict = translations.ToDictionaryIgnoreDuplicates(x => x.MovieMetadataId);
 
             var updatedMovies = _movieService.UpdateMovie(moviesToUpdate, !resource.MoveFiles);