ServiceNow and PagerDuty Integration - Turn off Self Acknowledgement when ServiceNow Incident gets assigned to

When ServiceNow Incident is Assigned to Any person, PagerDuty Incident gets assigned to that person and self acknowledged.
We don’t want to Self Acknowledge the PagerDuty incident when ServiceNow Incident is assigned to anyone.
The Assigned To Field in ServiceNow is updated with any person, PagerDuty Should not acknowledge and stay Triggered until Paged out person acknowledges the PagerDuty.
How to make that happen? Looking at Business Rules - PD Ack incident on self-assignment, does this needs to be turned off?