Using the ArcGIS Pro Business Analyst extension, a Statistical Data Collections toolset created with ArcGIS Pro 3.x cannot be used with ArcGIS Pro 2.9.x.
This issue works correctly in subsequent ArcGIS Pro versions (3.3, 3.4, 3.5). Using the data associated with this bug, edit SDCX and enrich the work interchangeably for SDCX files created in ArcGIS Pro 3.3, 3.4, and 3.5.