Why am I getting the following error after updating from 6.6.0 to 6.6.3: Invalid key in stanza [auditTrail] in /opt/splunk/etc/system/local/audit.conf

I'm getting this error: Invalid key in stanza [auditTrail] in /opt/splunk/etc/system/local/audit.conf Looking at the audit.conf.spec, that key is no longer mentioned. In earlier versions it was. I couldn't find anything in the release notes about this.