Unlink a bidirectional 1:n mapping without orphan removal by JPA

Code is related to a question on Stack Overflow: https://stackoverflow.com/questions/77110587/unlink-a-bidirectional-1n-mapping-without-orphan-removal-by-jpa

Database

http://localhost:8080/h2-console

Endpoints

get all parents with children:

GET http://localhost:8080/parents

unlink all odd children from parent no.1:

POST http://localhost:8080/parents/1/unlink