I created a module with the structure of master-detail form.

I want to be able to update the information from CRM API V2.

I'm able to insert the data directly to the Master, a Custom Module, so far it is good until that point.

The problem comes when I try to insert the information to the Custom Linked module that was created on the designer. Currently I'm trying to make a sample insert and I got the error:

I always get the error:   (400) Bad Request.

I'm doing the update in the same way I do with a custom module, I'm just adding extra a parentId.

Do you how can I found what is the better way to make this kind of insert.

How can I get information about what is causing that Bad Request in order to be able to fix.

There is other posibility to do this? Like create 2 custom modules and some how reference them to show on the same form, I really neeed this concept of the master-detail  form inserted from the api.

Thank you