RH-SSO Operator upgrade to 7.6.4 is causing embedded Postgresql pod crash

Since today morning there are quite a few cases reported where the automatic upgrade of RH-SSO to 7.6.4 is causing below error in Embedded postgresql instance:

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Incompatible data directory. This container image provides PostgreSQL '13', but data directory is of version '10'. This image supports automatic data directory upgrade from '12', please carefully consult image documentation about how to use the '$POSTGRESQL_UPGRADE' startup option.

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• It seems there has been change in PostgreSQL image to 13.

• The users using already existing embedded PostgreSQl is expecting the Postgres version to be 10, as the data is from old version.

This seems to be a bug, which could cause large impact for Non-Compliant users(that is using embedded Postgresql instance in production)

Currently we are suggesting the customers to use older version of Postgresql using RELATED_IMAGE_POSTGRESQL