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?
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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.