I'm trying to create new task using xog in wbs. For your reference ive WBS Structure defined as follows
Now I'm trying to create Task3 at same level of task1 and task2. I know i may need to use tag "Parent" and "nextSiblingof" to use PREXTERNALID(DB) of PRTASK table. Unfortunately none of my prtask values have value for PREXTERNALID. It's null. So i cant provide the reference for my new task to drop exactly under activity.
Is there any way I can make the new task created under this exact WBS node without using PREXTERNALID?