portsupgradeで、こんなのでるんだけどどうすればいいの？

[Updating the pkgdb <format:bdb1_btree> in /var/db/pkg ...
Failed `Inappropriate file type or format'; rebuild needed] [Rebuilding the pkgdb
<format:bdb1_btree> in /var/db/pkg ... - 319 packages found (-0 +319) .......................................................
....................................................................................... done]
---> Uninstalling the old version
[Updating the pkgdb <format:dbm_hash> in /var/db/pkg ... Inappropriate file type or format
- /var/db/pkg/pkgdb; rebuild needed] [Rebuilding the pkgdb <format:dbm_hash> in /var/db/pkg ... -
319 packages found (-0 +319) ...................................................................................................................................................................