[Mailman-Users] GID problem after upgrade

[Bo320]

Hi all,

I have been upgrading mailman an ran into the familiar problem:

Command died with status 2: "/usr/lib/mailman/mail/mailman post list1". 
Command output: Failure to exec script. WANTED gid 2147483647, GOT gid 67. )

The problem is that i have never found a proper solution for it.
Rebuilding mailman is not an option for me (i install from SuSE distro's).
Does anyone has a simple straightforward checklist to solve this problem?

Thanks!

-- 
Kind Regards / Met vriendelijke groet,

Bo320