Procurement Contract conversion

Summary: While trying to load the Contracts Header file in Instance, getting the below error:

'A matching record of the HR_ORG_UNIT_CLASSIFICATIONS_F type either can't be found using the value of the BU_NAME attribute or the matching record isn't active.  Details: Either there isn't a record with the specified attribute value or a matching record does exist but it isn't active. Update the attribute value to reference an existing, active record.'

Content (please ensure you mask any confidential information):

Uploading the .xlsx file since this window does not support .csv file for reference.

Kindly help me in fixing this issue, I am only trying to upload the Contract Header file for time being.