We have Portal HA 10.81, Portal 1 (Primary) and Portal 2 (standby) were interchange for their behavior for P2 to become primary and P1 to be standby , after running this scenario for almost 24 hrs, the old scenario was restored again P1 to become primary and P2 to be standby . due to this the below issues in the portal logs were identified.

SEVERE HA: Unable to create trigger file C:\arcgisportal\db\promote.dat, database cannot be promoted.
Please needs a solution to resolve this.
appreciated.