diff --git a/SimpleAdmin.Application/Services/Onboarding/OnboardingTemplate/OnboardingTemplateService.cs b/SimpleAdmin.Application/Services/Onboarding/OnboardingTemplate/OnboardingTemplateService.cs
index 4686fd7..40b15f9 100644
--- a/SimpleAdmin.Application/Services/Onboarding/OnboardingTemplate/OnboardingTemplateService.cs
+++ b/SimpleAdmin.Application/Services/Onboarding/OnboardingTemplate/OnboardingTemplateService.cs
@@ -96,10 +96,16 @@ public class OnboardingTemplateService : IOnboardingTemplateService
         NormalizeAndValidateInput(input);
         await ValidateReferences(input);
 
-        var codeOwner = await _db.Queryable<ObOnboardingTemplate>()
+        var codeOwnerQuery = _db.Queryable<ObOnboardingTemplate>()
             .ClearFilter()
-            .FirstAsync(item => item.TemplateCode == input.TemplateCode
-                                && (!input.Id.HasValue || item.Id != input.Id.Value));
+            .Where(item => item.TemplateCode == input.TemplateCode);
+        if (input.Id.HasValue)
+        {
+            var currentTemplateId = input.Id.Value;
+            codeOwnerQuery = codeOwnerQuery.Where(item => item.Id != currentTemplateId);
+        }
+
+        var codeOwner = await codeOwnerQuery.FirstAsync();
         if (codeOwner != null && !codeOwner.IsDelete)
             throw Oops.Bah("入职模板编码已存在");