CentOS 7 installer clamd service restart message in error when not installing amavisd

Installation of version 3.1.15p3 on CentOS 7 1908 build. Wanted to check out rspamd in place of amavisd/spamassasin. Did not install amavisd or spamassasin, installed rspamd plus redis, seems to be operational. Also installed clamav apparently there is a plugin for rspamd.

installing ispconfig, received [expected] messages on missing items and skipped: [WARN] autodetect for Spamassassin failed Force configure Spamassassin (y,n) [n]: n Skipping Spamassassin [WARN] autodetect for Amavisd failed Force configure Amavisd (y,n) [n]: n Skipping Amavisd

On completion, received [unexpected] error message on restarting services ... Job for clamd@amavisd.service failed because the control process exited with error code. See "systemctl status clamd@amavisd.service" and "journalctl -xe" for details. Installation completed.

I cannot find any evidence that the installer has incorrectly tried to configure an instantiated service unit but I dont think the installer should be trying to restart the service (that doesnt logically exist)

Grateful for comment on this behaviour or perhaps I'm doing something wrong. KR

Rob