diff --git a/models/useradmin.go b/models/useradmin.go
index 62126d9..2f15bf4 100644
--- a/models/useradmin.go
+++ b/models/useradmin.go
@@ -4,7 +4,7 @@ import "github.com/beego/beego/v2/core/logs"
 
 type UserAdmin struct {
 	ID      int
-	Content string
+	Content string `gorm:"unique"`
 }
 
 func IsUserAdmin(id string) bool {