[Rspamd-Users] call to (SETTINGS_CHECK) failed

[bebris28 .]

Hi rspamd users.
After upgrade from rspamd 1.8.3 to version 2.2 it started to give an error
messages:
"call to (SETTINGS_CHECK) failed (2):
/usr/share/rspamd/plugins/settings.lua:49: settings id has been already set
to 607408053 (outgoing_auth); trace: [1]:{[C]:-1 - set_settings_id [C]};
[2]:{/usr/share/rspamd/plugins/settings.lua:49 - apply_settings [Lua]};
[3]:{/usr/share/rspamd/plugins/settings.lua:328 - [Lua]};"

Error appears very often and I have no clue what causes it.
I'll be grateful if you could help.
I'm on Ubuntu 18.04.3 LTS.
regards
Juris