Plesk upgrade from 11.5 to 12 failed with error:
ERROR: Unable to resolve components request mode changeset due to inter-component dependencies. You possibly need to remove some of the conflicting components. Check '/var/log/plesk/install/autoinstaller3.log' for more details.
The following warning can be found in '/var/log/plesk/install/autoinstaller3.log' file:
Warning: found inter-component dependencies conflict between 'msmtp' (will be installed: 1, request = REQ_INSTALL) and 'courier' (will be installed: 1, request = REQ_INSTALL) while trying to resolve REQ_INSTALL of component 'awstats' and 12 more change(s)
External SMTP Server is used. Mail server packages were not fully removed.
This is a software issue with internal ID
# yum remove psa-courier-authlib psa-courier-imap