is marked but not imported

e.g. Traceback (most recent call last):
  File "./import_package.py", line 753, in <module>
    no_existing=options.no_existing))
  File "./import_package.py", line 683, in main
    revid_db, bstore, possible_transports=possible_transports)
  File "./import_package.py", line 530, in find_unimported_versions
    importp.version, importp.distro, importp.release)
AssertionError: tracker 4.3-10 debian woody is marked but not imported

Affects:
 - tracker