diff --git a/Penumbra/Api/PenumbraApi.cs b/Penumbra/Api/PenumbraApi.cs
index 3c666dc4..913deaf3 100644
--- a/Penumbra/Api/PenumbraApi.cs
+++ b/Penumbra/Api/PenumbraApi.cs
@@ -848,10 +848,16 @@ public class PenumbraApi : IDisposable, IPenumbraApi
         if (!_tempCollections.CollectionByName(collectionName, out var collection))
             return PenumbraApiEc.CollectionMissing;
 
-        if (!forceAssignment
-         && (_tempCollections.Collections.Individuals.ContainsKey(identifier)
-             || _collectionManager.Individuals.Individuals.ContainsKey(identifier)))
+        if (forceAssignment)
+        {
+            if (_tempCollections.Collections.Individuals.ContainsKey(identifier) && !_tempCollections.Collections.Delete(identifier))
+                return PenumbraApiEc.AssignmentDeletionFailed;
+        }
+        else if (_tempCollections.Collections.Individuals.ContainsKey(identifier)
+              || _collectionManager.Individuals.Individuals.ContainsKey(identifier))
+        {
             return PenumbraApiEc.CharacterCollectionExists;
+        }
 
         var group = _tempCollections.Collections.GetGroup(identifier);
         return _tempCollections.AddIdentifier(collection, group)
diff --git a/Penumbra/Api/TempCollectionManager.cs b/Penumbra/Api/TempCollectionManager.cs
index fab7eace..18a7e43f 100644
--- a/Penumbra/Api/TempCollectionManager.cs
+++ b/Penumbra/Api/TempCollectionManager.cs
@@ -67,11 +67,11 @@ public class TempCollectionManager : IDisposable
         collection.ClearCache();
         for (var i = 0; i < Collections.Count; ++i)
         {
-            if (Collections[i].Collection == collection)
-            {
-                _communicator.CollectionChange.Invoke(CollectionType.Temporary, collection, null, Collections[i].DisplayName);
-                Collections.Delete(i);
-            }
+            if (Collections[i].Collection != collection)
+                continue;
+
+            _communicator.CollectionChange.Invoke(CollectionType.Temporary, collection, null, Collections[i].DisplayName);
+            Collections.Delete(i--);
         }
 
         return true;