I am trying to insert Junction object data based on External Id of the Contact. I have created an external id field as follows on Contact object:
- Name: External Id
- API: External_Id__c
- DataType: Text(20)
- External Id checkbox is selected.
Junction object has Lookup relationship to Contact with API Name Contact__c
In the data loader, it is unable to find the Contact relationship based on External Id.
Any suggestions are welcome.