How to replace NULL Value with "Blank"



I'm extracting data from SQL Database and push it to Salesforce using ScribeOnline.

In my SQL database i have some ID's = NULL

In Saleforce those fields are lookup and when ID = NULL in my SQL Backoffice, they are beeing rejected : 

The following error has occurred in the Salesforce Connector: Cannot provide a NULL value for external reference Id.


Is there is a Way to put a Condition if ID=NULL, don't enter any value in Salesforce ? 




(2) Answers