Fix Dictionary error when launch arguments saved with duplicate arguments

CHANGELOG.md

@@ -19,6 +19,7 @@ and this project adheres to [Semantic Versioning 2.0](https://semver.org/spec/v2
 - Fixed issue where Checkpoints page may not show all checkpoints after clearing search filter
 - Fixed issue where Checkpoints page may show incorrect checkpoints for the given filter after changing pages
 - Fixed issue where Open Web UI button would try to load 0.0.0.0 addresses
+- Fixed Dictionary error when launch arguments saved with duplicate arguments
 ### Changed
 - Changed update method for SD.Next to use the built-in upgrade functionality
 - Model Browser navigation buttons are no longer disabled while changing pages

StabilityMatrix.Core/Models/LaunchOptionCard.cs

@@ -45,8 +45,13 @@ public readonly record struct LaunchOptionCard
         // During card creation, store dict of options with initial values
         var initialOptions = new Dictionary<string, object>();
         
-        // Dict of 
+        // To dictionary ignoring duplicates
-        var launchArgsDict = launchArgs.ToDictionary(launchArg => launchArg.Name);
+        var launchArgsDict = launchArgs
+            .ToLookup(launchArg => launchArg.Name)
+            .ToDictionary(
+                group => group.Key, 
+                group => group.First()
+            );
         
         // Create cards
         foreach (var definition in definitions)