Connecting Cloud Partner Portal with Dynamics and Receiving 'lead' entity error with missing attribute of Name='mslead_offersource'

Step

Lead management validation and registration

Error Message

Could not save the lead to Dynamics CRM. LastCRMError: 'lead' entity doesn't contain attribute with Name = 'mslead_offersource'., LastCRMException: System.ServiceModel.FaultException`1[Microsoft.Xrm.Sdk.OrganizationServiceFault]: 'lead' entity doesn't contain attribute with Name = 'mslead_offersource'. (Fault Detail is equal to Microsoft.Xrm.Sdk.OrganizationServiceFault).

Tracking Id

6611713b-a233-4b8b-b195-8cfdd5cdb312