problem re-installing textproc/sdocbook-xml

[Robert Huff]

	While trying to reinstall textproc/sdocbook-xml after disk
troubles, I get:

===>  Checking if textproc/docbook-sk already installed
for file in `/usr/bin/find /usr/ports/textproc/docbook-sk/work -type f | /usr/bin/sed -e 's|^/usr/ports/textproc/docbook-sk/work/||' | /usr/bin/grep -v '^\.' | /usr/bin/sort`; do  install  -o root -g wheel -m 444 /usr/ports/textproc/docbook-sk/work/$file /usr/local/share/xml/docbook/4.1.2/$file;  done
xmlcatmgr: entry already exists for `/usr/local/share/xml/docbook/4.1.2/docbook.cat' of type `CATALOG'
*** Error code 1

	Does anyone know how I fix this?  Having looked at the man-page
for xmlcatmgr I fail to see a way to, for example, delete the entry.


			Robert Huff