Bad Field Names on insert/update calls

Issue: The synchronization of Customers to Account was not happening properly as there were some of the fields that were present in QuickBooks Desktop which were not present in Salesforce. Hence the following error popped up in the Logs of the DBSyc Account of client.

Error:

Contact: bad field names on insert/update call: AssistantPhone, OtherPostalCode, OtherStreet, OtherCity
<b>Error Trace :</b>Contact: bad field names on insert/update call: AssistantPhone, OtherPostalCode, OtherStreet, OtherCity 

Solution:

This fields may not be present on the Salesforce page so go to "page layout" of the appropriate Account and add those fields there in order to avoid this issue.