case.setup reset required with esp. why?

[hkershaw-brown]

hkershaw@derecho5:/glade/work/hkershaw/crocodile_dec2025/cases/da-mom6-test.0010(da-mom6-test.0010)$ ./case.submit
Detected diff in locked file 'env_mach_pes.xml'
'NTASKS_ESP' has changed from 1 to 896
ERROR: For your changes to take effect, run:
./case.setup --reset

[hkershaw-brown]

buildnml sets NTASKS_ESP

case.set_value("NTASKS_ESP", max_ntasks)

./preview_namelists will trigger this.

Then when you do case built

hkershaw@derecho1:/glade/work/hkershaw/cases_2026/g_da_test0001(g_da_test0001)$ ./case.build
Building case in directory /glade/work/hkershaw/cases_2026/g_da_test0001
sharedlib_only is False
model_only is False
Detected diff in locked file 'env_mach_pes.xml'
'NTASKS_ESP' has changed from 1 to 896
ERROR: For your changes to take effect, run:
./case.setup --reset

Q. Should I just set NTASKS_ESP in the compset?
Q. Does NTASKS_ESP have to trigger a ./case.setup --reset ?