Hi Petar Tahchiev,

Per spec, @AttributeOverride is supposed to work only with entities inheriting from a @MappedSuperClass (and on embedded). So unfortunately, it won't work in your case. See https://static.javadoc.io/org.eclipse.persistence/javax.persistence/2.2.0/javax/persistence/AttributeOverride.html .

What you could do is put the common stuff into a @MappedSuperclass and inherit both Category and Taxon from there.

That should solve your issue.