oracle.jbo.InvalidOwnerException: JBO-25030: Failed to find or invalidate
owning entity: detail entity Emp, row key oracle.jbo.Key[-5 ].
at oracle.jbo.server.EntityImpl.internalCreate(EntityImpl.java:1048)
at oracle.jbo.server.EntityImpl.create(EntityImpl.java:811)

if you the above exception whn u create master /detail table then do the following

1. “Cascade Update Key Attributes” in association should be checked
2. In viewRowImpl add

@Override
public void setNewRowState(byte state) {
 if (state != Row.STATUS_INITIALIZED || getNewRowState() != Row.STATUS_NEW) {
 super.setNewRowState(state);
 }
}