https://userapps.support.sap.com/sap/support/knowledge/en/3531627
3531627 - Use of Datasources 0ORGUNIT_HIER and 0HR_PA_4 in S/4 HANA System | SAP Knowledge Base...
DataSource '0ORGUNIT_HIER and 0HR_PA_4 ' is listed as "Not Relevant for BW Extraction, DS not relevant" under the application component CA-HR as per Note...