diff --git a/frontend/src/components/dialog/create-tag-dialog.js b/frontend/src/components/dialog/create-tag-dialog.js
index c5c038cc9f..fe37b4f690 100644
--- a/frontend/src/components/dialog/create-tag-dialog.js
+++ b/frontend/src/components/dialog/create-tag-dialog.js
@@ -53,7 +53,7 @@ class CreateTagDialog extends React.Component {
       if (error.response.status === 500) {
         errMessage = gettext('Internal Server Error');
       } else if (error.response.status === 400) {
-        errMessage = gettext('Repo tag "{name}" is already exist.');
+        errMessage = gettext('Tag "{name}" already exists.');
         errMessage = errMessage.replace('{name}', Utils.HTMLescape(name));
       }
       this.setState({errorMsg: errMessage});
diff --git a/seahub/api2/endpoints/repo_tags.py b/seahub/api2/endpoints/repo_tags.py
index 656dc181d5..059decd8c0 100644
--- a/seahub/api2/endpoints/repo_tags.py
+++ b/seahub/api2/endpoints/repo_tags.py
@@ -98,7 +98,7 @@ class RepoTagsView(APIView):
             error_msg = 'Library %s not found.' % repo_id
             return api_error(status.HTTP_404_NOT_FOUND, error_msg)
 
-        repo_tag = RepoTags.objects.get_one_repo_tag(repo_id, tag_name, tag_color)
+        repo_tag = RepoTags.objects.get_repo_tag_by_name(repo_id, tag_name)
         if repo_tag:
             error_msg = 'repo tag %s already exist.' % tag_name
             return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
diff --git a/seahub/repo_tags/models.py b/seahub/repo_tags/models.py
index 500bef3240..9f827cbacb 100644
--- a/seahub/repo_tags/models.py
+++ b/seahub/repo_tags/models.py
@@ -8,9 +8,9 @@ class RepoTagsManager(models.Manager):
     def get_all_by_repo_id(self, repo_id):
         return super(RepoTagsManager, self).filter(repo_id=repo_id)
 
-    def get_one_repo_tag(self, repo_id, tag_name, tag_color):
+    def get_repo_tag_by_name(self, repo_id, tag_name):
         try:
-            return super(RepoTagsManager, self).get(repo_id=repo_id, name=tag_name, color=tag_color)
+            return super(RepoTagsManager, self).get(repo_id=repo_id, name=tag_name)
         except self.model.DoesNotExist:
             return None