I am cleaning up an attribute table in Advanced Desktop ArcMap version 10.3.1. It is in an SDE database, registered, versioned, etc. I disconnected all other users and attempted to both delete a field and add a field. I kept receiving two different error messages. One said there were locks on the data - even after I disconnected everyone - and the other said I didn't have permission to perform the operation even though I created the data and have full edit priviledges. (SELECT, INSERT, UPDATE, DELETE). Can someone illuminate me to what I am missing? I searched the desktop help but did not find any useful information to trouble shoot my issue.