Given Tabels A, B, C:

Attributes table A:
A_ID

Attributes table B:
B_ID
A_ID --> Foreign Key
C_ID --> Foreign Key

Attributes table C:
C_ID
A_ID --> Foreign Key

JPA Entities implementation:
There is a bidirectional Relation between class B and A.
The relation betwenn Class C and A is not mapped. There is only a @Column("A_ID") annotation in C on the "A- Attribute"

Task:
Here is the insert/update order, how I am calling the entity manager.

1. Persist on entity representing table C (FK A_ID) not yet set in this table
2. Setting C_ID in Entity representing table B
3. Persist on entity representing table A. Because of a cascade there is a new insert on table B
4. Setting A_ID in entity for table B
5. Merge on entity for table C

This always ends in a foreign key constraint exception because hibernate creates the Update (Nr. 3) after the insert on table C (Nr. 1)

Why does it does not follow the order how I am calling the entity manager ?