diff --git a/Flow.Launcher.Core/Plugin/PluginManager.cs b/Flow.Launcher.Core/Plugin/PluginManager.cs
index b808e2a7f..70a9c9c0f 100644
--- a/Flow.Launcher.Core/Plugin/PluginManager.cs
+++ b/Flow.Launcher.Core/Plugin/PluginManager.cs
@@ -721,12 +721,12 @@ namespace Flow.Launcher.Core.Plugin
 
         #region Plugin Action Keyword
 
+        [Obsolete("This method is only used for old Flow compatibility.")]
         public static bool ActionKeywordRegistered(string actionKeyword)
         {
-            // this method is only checking for action keywords (defined as not '*') registration
-            // hence the actionKeyword != Query.GlobalPluginWildcardSign logic
-            return actionKeyword != Query.GlobalPluginWildcardSign 
-                && _nonGlobalPlugins.ContainsKey(actionKeyword);
+            // Since now we support to assign one action keyword to multiple plugins,
+            // this check is unnecessary, so we will just return false here to ensure compatibility for old plugins.
+            return false;
         }
 
         /// <summary>
diff --git a/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs b/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
index 93844159f..b15aa844e 100644
--- a/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
+++ b/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
@@ -293,6 +293,10 @@ namespace Flow.Launcher.Plugin
         /// </summary>
         /// <param name="actionKeyword">The actionkeyword for checking</param>
         /// <returns>True if the actionkeyword is already assigned, False otherwise</returns>
+        /// <remarks>
+        /// Flow now supports to one action keyword to multiple plugins,
+        /// so this method is only used for old Flow compatibility.
+        /// </remarks>
         bool ActionKeywordAssigned(string actionKeyword);
 
         /// <summary>