Slackware :: Recover From "slackpkg Remove" Followed By "installpkg"?

Intending to remove jre-6u16-i586-1 and install jre-6u18-i586-1 on Slackware 13.0 32-bit, I used

Code:

slackpkg remove jre-6u16-i586-1
installpkg jre-6u18-i586-1.txz

This seems to have been the wrong way to do it because, now trying to remove jre-6u18-i586-1

Code:

removepkg jre-6u18-i586-1.txz

ls: cannot access /var/log/packages/jre-6u18-i586-1*: No such file or directory No such package: /var/log/packages/jre-6u18-i586-1.Can't remove.

ls -l /var/log/packages/jre* -rw-r--r-- 1 root root 35K 2010-03-09 20:28 /var/log/packages/jre-6u16-i586-1

What was wrong with what I did and how can I clean up?