diff --git a/app/models/issue_tag.rb b/app/models/issue_tag.rb
index 98e0f907..b4ee673f 100644
--- a/app/models/issue_tag.rb
+++ b/app/models/issue_tag.rb
@@ -28,7 +28,7 @@ class IssueTag < ApplicationRecord
   belongs_to :project, optional: true, counter_cache: true
   belongs_to :user, optional: true
 
-  validates :name, uniqueness: { message: "已存在" }
+  validates :name, uniqueness: {scope: :project_id, message: "已存在" }
 
   def self.init_data(project_id)
     data = [