Saw email about this this morning (locked list) Earlier sighting on ask@fedora on 2nd October. https://ask.fedoraproject.org/question/2657/free-media-form-trac-error
Traceback traceback
Could be: http://trac.edgewall.org/ticket/7644 ?
Looks like the comment at http://trac.edgewall.org/ticket/6032#comment:12 helped out.
There was a ticket that had only custom fields, not the normal ticket ones, so then when it tried to create it it picked the same id and blew up. ;(
I'm really not sure what caused it, but I manually fixed the db for now.
Please let me know if it's not working.