Very Annoying Error 4832

In ZOHO Desk, I'm trying to update a contact record. (Using API V2).

Here's the code:

———————

ticketID = 22360000000349752;

portal = "boltenergie";

department = "Bolt NL";

ticket = zoho.support.getRecordById("Requests",portal,department,ticketID);

info "-------------Ticket----------\n";

info ticket;

info '\n';

if(ticket.get("CASEID") != null)

{

contactID = ticket.get("CONTACTID").toLong();

channel = ifNull(ticket.get("Mode"),"");

language = ifNull(ticket.get("Language"),"");

// Get Corresponding Contact

correspondingContact = zoho.support.getRecordById("Contacts",portal,department,contactID);

info "-------------correspondingContact----------\n";

info correspondingContact;

info '\n';

response = zoho.support.updateRecord("Contacts",portal,department,contactID,correspondingContact);

info "-------------response----------\n";

info response;

info '\n';

}

———————

Here's the response with the (in)famous 4832 return code:

-------------Ticket----------
{"Email":"yves.delongie@gmail.com","Description":"null","Category":"null","CASEID":"22360000000349752","Comment Count":"0","Time to Respond":"null","SMCREATORID":"22360000000063005","Request Id":"226","SMOWNERID":"22360000000264006","Case Owner":"Yves Delongie","URI":"/support/boltenergie/ShowHomePage.do#Cases/dv/74c8a059c5ed1620eb2936b7beac8fb696cc343f88752363","CONTACTID":"22360000000219106","Ticket On Hold Time":" NULL ","DEP_ID":"22360000000069758","Modified By":"Rens Van Haute","Thread Status":"26","Account Name":"null","Department":"Bolt NL","Language":"nl","Phone":"+32 9 324 9317","Case Closed Time":"null","Classification":"null","Common Status":"created_viewed","Team":"NL Team","Ticket Id":"226","Thread Count":"1","Due Date":"null","Status":"Open","Customer Responded Time":"2019-03-15 20:44:58","MODIFIEDBY":"22360000000063005","Contact Name":"Testy Delongie","Priority":"null","Is Escalated":"false","Product Name":"null","Mode":"Chat","Is Overdue":"false","Modified Time":"2019-03-15 20:45:25","Subject":"Yoooo","Created Time":"2019-03-15 20:44:58","Ticket Owner":"Yves Delongie","Happiness Rating":"0","To Address":"null","Sub Category":"null","Created By":"Rens Van Haute","isSpam":"false","Resolution":"null","TEAM_ID":"22360000000216761"}
-------------correspondingContact----------
{"Zip":"null","Email":"yves.delongie@gmail.com","Description":"<p><\/p>","First Name":"Testy","Twitter":"null","SMCREATORID":"22360000000058017","Mapped With CRM":"163030000000303609","SMOWNERID":"22360000000169037","CONTACTID":"22360000000219106","Salutation":"null","Modified By":"Admin Operator","isPortalUser":"false","Account Name":"null","Language":"fr","Phone":"+32 9 324 9317","Common Status":"created_modified_viewed","Street":"null","Secondary Email":"null","Facebook":"null","MODIFIEDBY":"22360000000169037","Title":"null","City":"Gent","Mobile":"+32 9 324 9317","Contact Owner":"Admin Operator","Modified Time":"2019-03-15 21:11:37","Created Time":"2019-03-04 19:15:27","CRMCONTACTID":"163030000000303609","Type":"null","State":"Oost-vlaanderen","Country":"Belgium","Created By":"Yves Delongie","Last Name":"Delongie"}
-------------response----------

{"code":"4832","message":"Problem occured while processing the request"}

I've tried everything, from starting with an empty updateContact = map() and adding field by field... to now just simply re-taking the original result map.

Can someone tell me why I have this 4832 error?

Thanks,

Bolt Operator