Upgrade path for Keycloak from v12 to v21

Hi,I am trying to upgrade my Keycloak server from 12.0.4 to the newest Keycloak version, using an external postgres database. I understand that there are some migration process to move from old Widlfly distribution to the new Quarkus distribution. What is the recommended migration and upgrade approach? Does anyone have any experience with this and have any advice and issues to look out for? Thanks in advance!

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