If I flatten the entire design I get an error on a similar transistor

X521 vdda2 analog_subsystem_0/modulator_0/current_offset analog_subsystem_0/modulator_0/isense vdda2 sky130_fd_pr__pfet_g5v0d10v5 ad=0p pd=0u as=0p ps=0u w=5e+06u l=1e+06u