diff --git a/Assets/Cryville/Crtr/InputProxy.cs b/Assets/Cryville/Crtr/InputProxy.cs
index f3deaf2..4426cea 100644
--- a/Assets/Cryville/Crtr/InputProxy.cs
+++ b/Assets/Cryville/Crtr/InputProxy.cs
@@ -5,7 +5,6 @@ using Cryville.Crtr.Config;
 using System;
 using System.Collections.Generic;
 using UnityEngine;
-using Logger = Cryville.Common.Logger;
 
 namespace Cryville.Crtr {
 	public class InputProxy : IDisposable {
@@ -59,28 +58,29 @@ namespace Cryville.Crtr {
 			}
 		}
 		public void Set(InputProxyEntry proxy) {
-			var name = proxy.Target;
-			if (!_ruleset.inputs.ContainsKey(name)) throw new ArgumentException("Invalid input name");
-			if (_use[proxy.Target] > 0)
+			var target = proxy.Target;
+			if (!_ruleset.inputs.ContainsKey(target)) throw new ArgumentException("Invalid input name");
+			if (_tproxies.ContainsKey(target)) Remove(proxy);
+			if (_use[target] > 0)
 				throw new InvalidOperationException("Input already assigned");
 			if (proxy.Source != null) {
 				if (_judge != null) {
 					proxy.Source.Value.Handler.OnInput -= OnInput; // Prevent duplicated hooks, no exception will be thrown
 					proxy.Source.Value.Handler.OnInput += OnInput;
 				}
-				_tproxies.Add(proxy.Target, proxy);
+				_tproxies.Add(target, proxy);
 				_sproxies.Add(proxy.Source.Value, proxy);
-				IncrementUseRecursive(name);
-				IncrementReversedUseRecursive(name);
+				IncrementUseRecursive(target);
+				IncrementReversedUseRecursive(target);
 			}
 		}
 		void Remove(InputProxyEntry proxy) {
-			var name = proxy.Target;
-			if (_judge != null) _tproxies[name].Source.Value.Handler.OnInput -= OnInput;
-			_sproxies.Remove(_tproxies[name].Source.Value);
-			_tproxies.Remove(name);
-			DecrementUseRecursive(name);
-			DecrementReversedUseRecursive(name);
+			var target = proxy.Target;
+			if (_judge != null) _tproxies[target].Source.Value.Handler.OnInput -= OnInput;
+			_sproxies.Remove(_tproxies[target].Source.Value);
+			_tproxies.Remove(target);
+			DecrementUseRecursive(target);
+			DecrementReversedUseRecursive(target);
 		}
 		public bool IsUsed(InputSource src) {
 			return _sproxies.ContainsKey(src);