Hi everybody, I would like to ask for advice how to repair Domain level error, if it is possible. Short intro first: I installed two devuan based severs with samba 4.22.8 last month. I configured samba-ad-dc, upgraded schema to 2016, everything looked good. This is not my first installation. Yesterday I returned back to the tasks and plane to connect PCs, NAS, ... and strat production use, but when I made last check I discovered the error at primary controller: ERROR: Domain function level is higher than the lowest function level of a DC. Correct this or reprovision! I checked the smb.conf, at both servers is functional level 2016, check database, but at both servers I got 0 errors. I checked history and I checked functional level after raising level, so it must be OK at that time. When I check functional level at backup server I get correct answer: Domain and forest function level for domain 'DC=mydomain,DC=com' Forest function level: (Windows) 2016 Domain function level: (Windows) 2016 Lowest function level of a DC: (Windows) 2016 AD Schema is version 88 Unfortunately I (google) did not find any usable solution of this problem. Can somebody give me an advice how to correct this problem without reprovisioning? If I understand well, reprovision is new start and I need made all settings from the scratch. Thank you very much for your help. -- Greetings, ladas