This beta version of Field and table editing permissions - https://support.airtable.com/hc/en-us/articles/360043139673-Field-and-table-editing-permissions-beta- has bugs…
Every time when mouse cursor point to certain row, a check box will appear at its primary field. Users still can click on the check box and hit delete button to delete a / all records after setting nobody can delete records. Please disable the check box if permission is being set. Thanks.