Clear cancel token on failed use (#8705)

Content.Server/Tools/ToolSystem.TilePrying.cs

@@ -65,7 +65,7 @@ public sealed partial class ToolSystem
         var token = new CancellationTokenSource();
         component.CancelToken = token;
 
-        UseTool(
+        bool success = UseTool(
             component.Owner,
             user,
             null,
@@ -81,6 +81,9 @@ public sealed partial class ToolSystem
             doAfterEventTarget: component.Owner,
             cancelToken: token.Token);
 
+        if (!success)
+            component.CancelToken = null;
+
         return true;
     }