ValueError: Missing 'flags' field in data when running `run_mdet_sims` with `sim_func`

[s-Sayan]

I'm encountering a ValueError when running the function run_mdet_sims(sim_func, {"psf_fwhm": psf_fwhm}, seed=2000, n_sims=1) imported from mdet_meas_tools.py. The error message is:

ValueError: no field of name 'flags'

The error occurs during the execution of the _mask function in measure_shear_metadetect, where the code expects the field 'flags' in the data (which is an output of metadetect.metadetect.do_metadetect), but it is not present. This causes the simulation to fail.

Could you please assist with identifying why the 'flags' field is missing and how to resolve this issue?