PORTS: getting permanently errors with docbook-sk

[O. Hartmann]

Hello.

Since several weeks I get this error message while compiling docbook 
(needed for the doc project). Deinstalling everything I suspected to be 
related to docproj and reinstalling never helped. Maybe someone has 
similar problems and solutions.

Thanks in advance,

Oliver


P.S.

FreeBSD 6.1-STABLE/AMD64

===>  Extracting for docbook-sk-4.1.2_3
=> MD5 Checksum OK for docbkx412.zip.
=> SHA256 Checksum OK for docbkx412.zip.
===>   docbook-sk-4.1.2_3 depends on executable: unzip - found
===>  Patching for docbook-sk-4.1.2_3
===>  Configuring for docbook-sk-4.1.2_3
===>  Installing for docbook-sk-4.1.2_3
===>   docbook-sk-4.1.2_3 depends on file: /usr/local/bin/xmlcatmgr - found
===>   Generating temporary packing list
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

Stop in /usr/ports/textproc/docbook-sk.