[Samba] remove group mappings manually?

[Paddy O'Herlihy]

Hi,

We have a os x server here with duplicate groupmappings unfortunately the
net groupmap functions are broken due to apple modifications.

Can I manually delete the groupmapping from the database?

I assumed the group mappings were stored in ldap but can't find any
reference there. The group_mapping tdb also seems empty so asides rom
looking at the source I am at a loss.

Many thanks

Paddy