Reported by @zimea.
Reading Zarr v2 SpatialData Zarr objects gives version mismatch: detected: RasterFormatV02, requested: FormatV04. This was is due to the fact that spatialadata is calling ome_zarr.io.ZarrLocation passing the wrong fmt variable. Instead of passing a raster format class, we pass a OME-Zarr Format class.
Everything still works, but the warning message is annoying.