I have a question about the coredata relationship.

Essentially, if I have 1 entity called i.e parent and the other entity which it has a relationship with is children and it is inverse.

If I create the parent entity, will it create the children entity as well? I 've set the "parentchildrenrelationship" to optional but it looks like every time I create the parent entity, it creates the children entity.

Is that something normal ? Thanks