samba 4.7->4.8 in place upgrade

[Alexis Pellicier]

Hi,

I'm testing the in-place upgrade from 4.7.5 samba to 4.8 and unfortunately
it breaks.
After de upgrade samba seems to have trouble to find his way through the db:

#ldbsearch -V
Version 4.8.0

#ldbsearch -H private/sam.ldb

Unable to determine the DomainSID, can not enforce uniqueness constraint on
local domainSIDs

search error - No such Base DN: DC=example,DC=com

​I've downgrade​d to DN-based index value using the provide
source4/sambaundoguididx script,
and ldbsearch 4.7.5 is happy with it.

Could you advise me any check I could do to find out what's happening?

Thanks.