fix crash when player has duplicate item references

2 files changed, 3 insertions, 2 deletions

diff --git a/docs/release-notes.md b/docs/release-notes.md
index c65d6e0d..66d911b7 100644
--- a/docs/release-notes.md
+++ b/docs/release-notes.md
@@ -4,7 +4,6 @@
 * For players:
   * Added support for Stardew Valley 1.3+; no longer compatible with earlier versions.
   * Added `Context.IsMultiplayer` and `Context.IsMainPlayer` flags.
-  * Fixed SMAPI update alerts linking to the GitHub repository instead of [smapi.io](https://smapi.io).
   * Fixed SMAPI update checks not showing newer beta versions when using a beta version.
 
 * For modders:
@@ -21,6 +20,8 @@
 ## 2.5.5
 * For players:
   * Fixed mods not being loaded if an optional dependency is installed but skipped.
+  * Fixed rare crash when the game duplicates an item.
+  * Fixed SMAPI update alerts linking to the GitHub repository instead of [smapi.io](https://smapi.io).
 
 * For the [log parser][]:
   * Tweaked UI.
diff --git a/src/SMAPI/Framework/SGame.cs b/src/SMAPI/Framework/SGame.cs
index ae702711..9af02dd4 100644
--- a/src/SMAPI/Framework/SGame.cs
+++ b/src/SMAPI/Framework/SGame.cs
@@ -569,7 +569,7 @@ namespace StardewModdingAPI.Framework
                     this.PreviousForagingLevel = Game1.player.foragingLevel;
                     this.PreviousMiningLevel = Game1.player.miningLevel;
                     this.PreviousLuckLevel = Game1.player.luckLevel;
-                    this.PreviousItems = Game1.player.items.Where(n => n != null).ToDictionary(n => n, n => n.Stack);
+                    this.PreviousItems = Game1.player.items.Where(n => n != null).Distinct().ToDictionary(n => n, n => n.Stack);
                     this.PreviousLocationObjects = this.GetHash(Game1.currentLocation.objects);
                     this.PreviousTime = Game1.timeOfDay;
                     this.PreviousMineLevel = Game1.mine?.mineLevel ?? 0;