The ZohoBooks API as documented at https://www.zoho.com/books/api/v3/contacts/#update-a-contact appears to have a bug.

Updating certain users always results in this error:

code: 3087
message: Cannot delete contact person as it is linked to Zoho CRM Contact.

This is simply wrong! We should be able to update a ZohoBooks contact (e.g. updated address etc) regardless of whether or not the same contact exists in other Zoho service such as your CRM etc! An updating a contact is not the same as deleting one!

Please advise on how we can use your API, as documented at https://www.zoho.com/books/api/v3/contacts/#update-a-contact, without having to check other APIs such as the CRM etc.

Juergen