Portupgrade pkgdb.db: unexpected file type or format

After upgrading FreeBSD from v6 to 6.1, i tried to upgrade all software installed on the server with portupgrade.

 

I start getting the error

 

[Updating the pkgdb <format:bdb_btree> in /var/db/pkg ... /var/db/pkg/pkgdb.db: unexpected file type or format -- Invalid argument; rebuild needed] [Rebuilding the pkgdb <format:bdb_btree> in /var/db/pkg ... [Updating the pkgdb <format:bdb_btree> in /var/db/pkg ... /var/db/pkg/pkgdb.db: unexpected file type or format -- Invalid argument; rebuild needed] [Rebuilding the pkgdb <format:bdb_btree> in /var/db/pkg ... /var/db/pkg/pkgdb.db: unexpected file type or format -- Invalid argument: Cannot update the pkgdb!]: Cannot update the pkgdb!]
Command failed [exit code 1]: /usr/local/sbin/pkgdb -aFQ

 

The problem is fixed by deleting the pkgdb.db file

 

 

server26# rm /var/db/pkg/pkgdb.db