[Samba] Samba4.6 - Groups creation/import fails

[Julien TEHERY]

Hello,

Actually migrating users/groups from samba3 to samba4 (in a separate 
domaine), i succeeded in importing users/gruops and their attributes.
But For a reason i don't know some (a few) groups are not being created, 
and i get this error:

"Failed to create group "MYGROUP" - samldb: Account name 
(sAMAccountName) 'MYGROUP' already in use! "

Searching in ADUC no such group exists.
Searching with "wbinfo -g" either

I also tried a dbcheck in case something was corrupt, but had 0 errors 
to fix.

I also restarted samba/winbind just to see if there were any kind of 
cache or not. Nothing changed.

Has any of you ever experienced such problems in creating objects that 
are told to already exist ?


My env: Samba 4.6.4


Regards,