https://userapps.support.sap.com/sap/support/knowledge/en/1942973
1942973 - Datasource extractor 0UC_SALES_STATS_01 or 0UC_SALES_STATS_02 does not bring partial...
When using datasource extractor 0UC_SALES_STATS_01 or 0UC_SALES_STATS_02 to extract sales statistics the partial invoices (without billing document) are not...
https://userapps.support.sap.com/sap/support/knowledge/en/1805595
1805595 - How to reload Data with Data Source 0UC_SALES_STATS_02 = Information how a full works...
A reload of your Sales Statistic Data is needed. A full should be done to reload data.