Insert a record to custom Module with a related item field

Insert a record to custom Module with a related item field

Hello,

I'm currently integrating the Zoho API into my system,
I'd like to insert a record for my module (let's say CustomModule 1) with a related item field linked to Accounts module.
But I'm not able to send the Id of the associated Account in the tag <FL>
Error message is returned : You have given a wrong value for the field * My related item field to Accounts *

Has anyone ever encountered this problem?

Thank you !