diff --git a/Assets/Scenes/MainScene.unity b/Assets/Scenes/MainScene.unity
index f597c7b..6a18fc5 100644
--- a/Assets/Scenes/MainScene.unity
+++ b/Assets/Scenes/MainScene.unity
@@ -98,7 +98,7 @@ LightmapSettings:
     m_TrainingDataDestination: TrainingData
     m_LightProbeSampleCountMultiplier: 4
   m_LightingDataAsset: {fileID: 0}
-  m_UseShadowmask: 0
+  m_UseShadowmask: 1
 --- !u!196 &4
 NavMeshSettings:
   serializedVersion: 2
@@ -5331,7 +5331,7 @@ PrefabInstance:
     - target: {fileID: 2746333758154926288, guid: 7e33cda9a5d8c3e478c6888db2b484ea,
         type: 3}
       propertyPath: m_AnchoredPosition.y
-      value: 0.000061035156
+      value: 0.000289917
       objectReference: {fileID: 0}
     - target: {fileID: 2746333758154926288, guid: 7e33cda9a5d8c3e478c6888db2b484ea,
         type: 3}
@@ -5341,7 +5341,7 @@ PrefabInstance:
     - target: {fileID: 2746333758174583497, guid: 7e33cda9a5d8c3e478c6888db2b484ea,
         type: 3}
       propertyPath: m_AnchoredPosition.y
-      value: -0.000030517578
+      value: 0.00025177002
       objectReference: {fileID: 0}
     - target: {fileID: 2746333758174583497, guid: 7e33cda9a5d8c3e478c6888db2b484ea,
         type: 3}
@@ -5481,7 +5481,7 @@ PrefabInstance:
     - target: {fileID: 2746333759616755060, guid: 7e33cda9a5d8c3e478c6888db2b484ea,
         type: 3}
       propertyPath: m_AnchoredPosition.y
-      value: 0.000015258789
+      value: -0.00021362305
       objectReference: {fileID: 0}
     - target: {fileID: 2746333759616755060, guid: 7e33cda9a5d8c3e478c6888db2b484ea,
         type: 3}
diff --git a/Assets/Scripts/ViewModels/TagEditorModel.cs b/Assets/Scripts/ViewModels/TagEditorModel.cs
index 4110f9b..fa8de06 100644
--- a/Assets/Scripts/ViewModels/TagEditorModel.cs
+++ b/Assets/Scripts/ViewModels/TagEditorModel.cs
@@ -79,6 +79,11 @@ private void SelectionChanged()
         private static bool IsValidEditorTag(string tag) => !tag.StartsWith("folder:") && !tag.StartsWith("collection:");
         private static HashSet<string> Filter(IReadOnlyCollection<string> tags) => tags.Where(IsValidEditorTag).ToHashSet();
 
+        protected override bool IsValidTag(string tagText) =>
+            !string.IsNullOrWhiteSpace(tagText) 
+            && IsValidEditorTag(tagText) 
+            && Tags.Where(t => !t.IsPartial).All(tag => tag.Text != tagText);
+
         private IEnumerable<string> Hashes => Mode == Current
             ? new[] {_detailMenu.Current.Value.FileHash}
             : _detailMenu.Selection.Select(pi => pi.FileHash);
diff --git a/Assets/Scripts/ViewModels/TagInputModelBase.cs b/Assets/Scripts/ViewModels/TagInputModelBase.cs
index 829f006..d5cc710 100644
--- a/Assets/Scripts/ViewModels/TagInputModelBase.cs
+++ b/Assets/Scripts/ViewModels/TagInputModelBase.cs
@@ -60,9 +60,13 @@ private void SuggestionChosen(SuggestionModel suggestion)
         private bool AddTag(string tagText)
         {
             tagText = tagText?.Trim().ToLowerInvariant();
-            if (!string.IsNullOrEmpty(tagText) && Tags.All(tag => tag.Text != tagText))
+            if (IsValidTag(tagText))
             {
                 tagText = OnAddingTag(tagText);
+                
+                var sameTag = Tags.FirstOrDefault(t => t.Text == tagText);
+                if (sameTag != null) Tags.Remove(sameTag);
+                
                 Tags.Add(new TagModel(tagText, RemoveTag));
                 
                 return true;
@@ -71,6 +75,11 @@ private bool AddTag(string tagText)
             return false;
         }
 
+        protected virtual bool IsValidTag(string tagText)
+        {
+            return !string.IsNullOrEmpty(tagText) && Tags.All(tag => tag.Text != tagText);
+        }
+
         protected virtual string OnAddingTag(string tagText) => tagText;
 
         protected virtual bool CanPinCurrentInput()