Error loading Suppliers to Planning Central for External Source

Summary

Receiving the error "For the specified source system, a record with value {VALUE} for attribute PARTNER_NAME already exists with a different value for attribute PARTNER_NUMBER."

Content

When loading Suppliers, every row is getting the error shown in the summary.  This seems to be a false error since I have unique values for PARTNER_NAME and PARTNER_NUMBER on every row as in the image shown below.  I'm also attaching the log for this process. 

Has anyone seen this issue previously and, if so, what's the resolution?

Thanks in advance.