When a relationship one-to-many is created. If the rule aren't run in the right order, data transfer are in create_ko instead of relate_ko.
Exemple with a relationship customer - address from Prestashop to SuiteCRM:
The rule address has to be run after your rule customer because of the relationship. The rule customer is the parent and will create the contact in the CRM. Then the rule address will update this contact. If the rule address is run first, it can’t modify the contact because it doesn’t yet exist.
The transfer address should be in the status relate_ko but it is in create_ko..