Today I had problems
trying to fix
the versioning information of
bug #343593. Neither the correct
command notfound 343593 4.2.26-2 nor an unversioned reopen made the
bts forget the wrong "found in 4.2.26-2".
Jeroen told me of a heavier boot to kick the bts with: reassigning somewhere else and back again. This worked nicely.
Documented here, so I will be able to look it up later.
Update:
Steinar remarked:
You do not actually need two reassigns, just reassign to the same package and all version information is gone.