Found the "Commit your work" error.
Sometimes the "Commit your work" link simply didn't show up.
(for more info search for "batigol" in the IRC log https://openacs.org/irc/log/2003-10-17)
the problem is in line 209 and 210 of
/web/yourserver/packages/edit-this-page/sql/edit-this-page-create.sql
where i.name = name
and i.parent_id = etp.get_folder_id(package_id)
Should be
where i.name = create_new_revision.name
and i.parent_id = etp.get_folder_id(create_new_revision.package_id)