diff --git a/Editor/BuildProcessors/AddLil2cppSourceCodeToXcodeproj2022OrNewer.cs b/Editor/BuildProcessors/AddLil2cppSourceCodeToXcodeproj2022OrNewer.cs
index b82c1ca..86d5673 100644
--- a/Editor/BuildProcessors/AddLil2cppSourceCodeToXcodeproj2022OrNewer.cs
+++ b/Editor/BuildProcessors/AddLil2cppSourceCodeToXcodeproj2022OrNewer.cs
@@ -37,15 +37,25 @@ namespace HybridCLR.Editor.BuildProcessors
         {
             string pbxprojContent = File.ReadAllText(pbxprojFile, Encoding.UTF8);
             string removeBuildOption = @"--external-lib-il2-cpp=\""$PROJECT_DIR/Libraries/libil2cpp.a\""";
-            if (!pbxprojContent.Contains(removeBuildOption))
+            if (pbxprojContent.Contains(removeBuildOption))
             {
-                //throw new BuildFailedException("modified project.pbxproj fail");
-                Debug.LogError("[AddLil2cppSourceCodeToXcodeproj] modified project.pbxproj fail");
-                return;
+                pbxprojContent = pbxprojContent.Replace(removeBuildOption, "");
+                Debug.Log($"[AddLil2cppSourceCodeToXcodeproj] remove il2cpp build option '{removeBuildOption}' from file '{pbxprojFile}'");
             }
-            pbxprojContent = pbxprojContent.Replace(removeBuildOption, "");
+            else
+            {
+                Debug.LogWarning($"[AddLil2cppSourceCodeToXcodeproj] project.pbxproj remove building option:'{removeBuildOption}' fail. This may occur when 'Append' to existing xcode project in building");
+            }
+
+            int strShellScriptIndex1 = pbxprojContent.IndexOf("/* ShellScript */,");
+            int strShellScriptIndex2 = pbxprojContent.IndexOf("/* ShellScript */,", strShellScriptIndex1 + 10);
+            if (strShellScriptIndex2 >= 0)
+            {
+                pbxprojContent = pbxprojContent.Remove(strShellScriptIndex1, strShellScriptIndex2 - strShellScriptIndex1);
+                Debug.LogWarning($"[AddLil2cppSourceCodeToXcodeproj] remove duplicated '/* ShellScript */' from file '{pbxprojFile}'");
+            }
+
             File.WriteAllText(pbxprojFile, pbxprojContent, Encoding.UTF8);
-            Debug.Log($"[AddLil2cppSourceCodeToXcodeproj] remove il2cpp build option '{removeBuildOption}' from file '{pbxprojFile}'");
         }
 
         private static void CopyLibil2cppToXcodeProj(string pathToBuiltProject)