Tobias Lanz, AFAICT, @AttributeOverrides on CfmsXXX is unnecessary since you already have @PrimaryKeyJoinColumn(name = "xxxid").

Does deleting that line work for you? If not, please open a new jira issue clarifying why you actually need that annotation along with a test case. You can find test templates at https://github.com/hibernate/hibernate-test-case-templates/.