@User Looking through the model files,

sky130_fd_pr__model__ parasitic__diode_ps2nw

is also used inside

sky130_fd_pr__nfet_g5v0d16v0

from body to drain and there is a mention of it's parameters in

sky130_fd_pr__pnp_05v5_W3p40L3p40

. Both uses seem appropriate, so res_generic_pd is probably incorrect and the renaming was done correctly.