diff --git a/R2API.Animations/Extensions.cs b/R2API.Animations/Extensions.cs
index 3eb0ee5b..ba7d0db9 100644
--- a/R2API.Animations/Extensions.cs
+++ b/R2API.Animations/Extensions.cs
@@ -26,6 +26,8 @@ public static int IndexOf<T>(this IEnumerable<T> values, Func<T, bool> predicate
             {
                 return i;
             }
+
+            i++;
         }
 
         return -1;
diff --git a/R2API.Animations/README.md b/R2API.Animations/README.md
index 43e88bd4..57249bce 100644
--- a/R2API.Animations/README.md
+++ b/R2API.Animations/README.md
@@ -25,6 +25,9 @@ To create `Modified Controller` use option `Assets/R2API/Animation/Copy Animator
 After that you add the `AnimatorDiff` to an `AssetBundle` and in code you can create an instance of `AnimatorModifications` with `AnimatorModifications.CreateFromDiff()`.
 
 ## Changelog
+### '1.2.2'
+* Fixed an issue where modifying a layer that has behaviours would result in an error.
+
 ### '1.2.1'
 * Fixed `AnimatorDiff` incorrectly diffing parameters in the editor.
 
diff --git a/R2API.Animations/thunderstore.toml b/R2API.Animations/thunderstore.toml
index be580cea..5446ce60 100644
--- a/R2API.Animations/thunderstore.toml
+++ b/R2API.Animations/thunderstore.toml
@@ -5,7 +5,7 @@ schemaVersion = "0.0.1"
 [package]
 namespace = "RiskofThunder"
 name = "R2API_Animations"
-versionNumber = "1.2.1"
+versionNumber = "1.2.2"
 description = "API for modifying RuntimeAnimatorController"
 websiteUrl = "https://github.com/risk-of-thunder/R2API"
 containsNsfwContent = false