I've noticed entries in my postmeta table where meta_key is _toolset_edit_last.
When are these fields generated? What purpose do they serve? What purpose do they serve that the wordpress built in _edit_last field doesn't? Is it safe to periodically delete them?
This hidden field is added to Toolset objects that are not edited with the standard post editor (which would receive the standard WordPress _edit_last field) and is used for internal purposes and should not be deleted.