I submitted my work and I received this error message. The challenge says nothing about adding a field with this name. 

Challenge Not yet complete... here's what's wrong: 
There was an unexpected error in your org which is preventing this assessment check from completing: System.DmlException: Insert failed. First exception on row 0; first error: REQUIRED_FIELD_MISSING, Required fields are missing: [Discount_Percent__c]: [Discount_Percent__c]

Hello,
I can't seem to pass the challenge "Integrating External Data" challenge in "Lighting Connect" module. I think I have done everything needed. 
When I checked the challenge, it says "System.ExternalObjectException: data.api.DataSourceException: This data isn't available because the phones object's "Phone_UUID" field has an invalid relationship."

I do have an indirect relationship set up from the Phone to User entity as required by the challenge.

Anyone have the same problem ?