Bug with "Calls" Related List ?

Bug with "Calls" Related List ?

Hello,

I can fetch records from "Calls" Related List using : 
RelatedCalls = zoho.crm.getRelatedRecords("Calls","Deals",dealId.toLong());

I can delete a specific related record by using :
deleteRecordMap = {"module":"Calls","id":rappelId};
deleteResp = zoho.crm.invokeConnector("crm.delete",deleteRecordMap);

But it's no possible to update a related record in "Calls" Module  using :
response = zoho.crm.updateRelatedRecord("Calls",callId,"Deals",dealId,call);

the error is : {"code":"INVALID_DATA","details":{},"message":"the relation name given seems to be invalid","status":"error"}

any idea ?

Thanks