1 files changed, 3 insertions, 0 deletions
diff --git a/app/models/user_team.rb b/app/models/user_team.rb
index 0cb84edd66d..d5b75851279 100644
--- a/app/models/user_team.rb
+++ b/app/models/user_team.rb
@@ -69,6 +69,9 @@ class UserTeam < ActiveRecord::Base
   end
 
   def add_members(users, access, group_admin)
+    # reject existing users
+    users.reject! { |id| member_ids.include?(id.to_i) }
+
     users.each do |user|
       add_member(user, access, group_admin)
     end