*Postinstall secret key was replaced based on different Secret PIT.
*This error occurs when you run Identity Service PostInstall on existing database twice
*Postinstall should be executed on empty database just only once.
Unique Secret PIT and PostInstall Secret key were generated.
*V22.8 installer runs this Postinstall even though upgrading
<Security Perspective>
*We have to manually fix this Postinstall Secret key.
*This is because we should not allow anyone to change Secret Key.
If Postinstall program automatically changes the exisiting database, it will be a security breach.
<Measurement>
*From next release (V22.9), If the installer finds existing Secret PIT, it doesn't run PostInstall.