Migration Guide

[kthoms]

The documentation should contain a detailed guide for migration from Camunda 7.

This issue is to collect known things to document. Add comments for things to add to this description.

• When upgrading the database schema with Liquibase it might occur that Liquibase complains about changed checksums. This is especially happening when Operaton beta versions have been used for the database upgrade. In this case start the server once with option spring.liquibase.clear-checksums=true
• The admin user has changed its name from camunda-admin to operaton-admin.