I have a list which is only editable by admins. Now I joined another list to the first one (repeatable, merged rows), which is editable by registered users and it is shown in a repeatable group. I played a little bit around with user access, editable by user id , etc. but I cannot achieve following conditions: - Table 1: should remain editable only by admins (that's fine) - Table 2: add listing = registered (and above), edit listing = only user id that added the listing and special, delete listing = only admin The problem is, that a registered user can delete the group, which contains data provided by previous users, even my own data. How can I prevent registered users from deleting groups? Or maybe there is a way to hide the minus (-) button for registered users. Thanks in advance for any ideas.