in code line “#Subcluster mature enterocytes
sc.tl.louvain(adata, restrict_to=('louvain_r0.5_entero_sub', ['Enterocyte mature']), resolution=0.25, key_added='louvain_r0.5_entero_mat_sub')”
i run ，appear error ：ValueError: 'Enterocyte mature' is not a valid category for 'louvain_r0.5_entero_sub'