Generated Key looks wrong when ManyToOne and OneToMany - postgresql

Question

I have two entities with a relationship, UserEntity:
#Embeddable
public class UserId extends EntityId implements Serializable {
#Column( length = CCEntity.ID_MAX_SIZE, name = ccIdCN )
private String ccId;
#Column( length = NAME_MAX_SIZE, name = userIdCN )
private String userId;
...
}
#Entity
#Table(name = TableNames.CC_Users)
public class UserEntity {
#EmbeddedId
private UserId id;
...
#OneToMany(targetEntity = ProfileEntity.class, mappedBy = "user", fetch = FetchType.EAGER, cascade = { CascadeType.PERSIST, CascadeType.REFRESH, CascadeType.MERGE })
private List<ProfileEntity> profiles;
And the ProfileEntity:
#Embeddable
public class ProfileId extends EntityId implements Serializable {
#Column( length = CCEntity.ID_MAX_SIZE, name = ccIdCN )
private String ccId;
#Column( length = NAME_MAX_SIZE, name = profileIdCN )
private String profileId;
....
}
#Entity
#Table(name = TableNames.CC_Profile)
public class ProfileEntity {
#EmbeddedId
protected ProfileId id;
...
#ManyToOne
#JoinColumns(value = {
#JoinColumn( nullable = true, name = Columns.referenceIdCN, referencedColumnName = UserId.userIdCN ),
#JoinColumn( nullable = true, name = Columns.ccIdOfReferenceCN, referencedColumnName = UserId.ccIdCN ),
})
private UserEntity user;
When JPA creates the tables it generates the following:
Table CC_USER with primary key: cc_id, user_id. That is correct.
Table CC_PROFILE with primary key: cc_id, user_id, profile_id. Here I don't understand why JPA adds the user_id column as primary key. The table also has the columns: reference_id and cc_id_of_reference_id set as nullable.
I want property user of the ProfileEntity is optional, or nullable. If I try to add an entity with the user as null, I get :
Internal Exception: org.postgresql.util.PSQLException: ERROR: null
value in column "user_id" violates not-null constraint
thanks for any help

Answer 1

Finally I found the issue. I have another Entity with same TableName as ProfileEntity, but a different id. That id contains the user_id column that wasn't expected.