Use of .producer causes warnings in Sprucing MC

See https://gitlab.cern.ch/lhcb/LHCb/-/blob/2024-patches/PyConf/python/PyConf/reading.py?ref_type=heads#L132

Using produced means the MC particles are not unpacked before the relations giving

WARNING Unable to resolve dependency /Event/HLT2/MC/Particles during unpacking of /Event/HLT2/Relations/ChargedPP2MCP
Unpack_Hlt2__Event_HLT2_Relation... WARNING failed to fetch container from /Event/HLT2/MC/Particles - requested 82 times

Note I see no such warnings when trying manually with do_unpacking with simulation set to True

Why does this not happen in the detdesc nightlies? eg. https://lhcb-nightlies.web.cern.ch/nightly/lhcb-2024-patches/135/Moore/x86_64_v3-el9-gcc13+detdesc-opt+g/tests#Hlt2Conf_sprucing_test_spruce_example_realtime_dstinput

Note you also see this in HLT2 output eg, the output of Moore.test_lbexec_hlt2_pp_2024_mc using explore.py and not setting mc to true

Edited Oct 03, 2024 by Nicole Skidmore

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