Requirement 26 of the GPKG Encoding standard says: >The geometry_type_name value in a gpkg_geometry_columns row SHALL be one of the **uppercase** geometry type names specified in [Geometry Types (Normative)](http://www.geopackage.org/spec/#geometry_types). WPS Download generates GPKGs with camel-case geometry column names, that are not accepted by validation tools. - Geoserver 2.20.6 - PostgreSQL 13 - PostGIS 3.1