I’m trying to upgrade Spring Boot of my project and the latest (development) builds are using Hibernate 5.4 but my project does not work anymore because a class using @MapsId is now unable to populate its id.
The error I get while trying to save a new object is:
Caused by: org.hibernate.id.IdentifierGenerationException: null id generated for:class
Has anybody noticed the problem?
Is there a workaround, otherwise the problem is blocking my upgrade.
Thanks for any hints