diff --git a/Penumbra.Api b/Penumbra.Api
index f66e49bd..d87dfa44 160000
--- a/Penumbra.Api
+++ b/Penumbra.Api
@@ -1 +1 @@
-Subproject commit f66e49bde2878542de17edf428de61f6c8a42efc
+Subproject commit d87dfa44ff6efcf4fe576d8a877c78f4ac0dc893
diff --git a/Penumbra/Api/PenumbraApi.cs b/Penumbra/Api/PenumbraApi.cs
index da560ca9..fba7cecb 100644
--- a/Penumbra/Api/PenumbraApi.cs
+++ b/Penumbra/Api/PenumbraApi.cs
@@ -905,8 +905,14 @@ public class PenumbraApi : IDisposable, IPenumbraApi
             return PenumbraApiEc.CollectionMissing;
         }
 
-        if( !forceAssignment
-        && ( Penumbra.TempMods.Collections.Individuals.ContainsKey( identifier ) || Penumbra.CollectionManager.Individuals.Individuals.ContainsKey( identifier ) ) )
+        if( forceAssignment )
+        {
+            if( Penumbra.TempMods.Collections.Individuals.ContainsKey( identifier ) && !Penumbra.TempMods.Collections.Delete( identifier ) )
+            {
+                return PenumbraApiEc.AssignmentDeletionFailed;
+            }
+        }
+        else if( Penumbra.TempMods.Collections.Individuals.ContainsKey( identifier ) || Penumbra.CollectionManager.Individuals.Individuals.ContainsKey( identifier ) )
         {
             return PenumbraApiEc.CharacterCollectionExists;
         }
diff --git a/Penumbra/Api/TempModManager.cs b/Penumbra/Api/TempModManager.cs
index 08393ebd..1034ca0d 100644
--- a/Penumbra/Api/TempModManager.cs
+++ b/Penumbra/Api/TempModManager.cs
@@ -187,7 +187,7 @@ public class TempModManager
             if( Collections[ i ].Collection == collection )
             {
                 CollectionChanged?.Invoke( CollectionType.Temporary, collection, null, Collections[ i ].DisplayName );
-                Collections.Delete( i );
+                Collections.Delete( i-- );
             }
         }