Persisting candidates from HLT2 lines in the Sprucing does not work.

I do the following, I define a sprucing line as:

from PyConf.reading import get_particles, upfront_decoder
def Sprucing_get_topo(name='Spruce_GetTopoCandidates'):
    with upfront_decoder.bind(input_process='Hlt2', stream=""):
        topo_particles = get_particles("/Event/HLT2/Hlt2Topo3Body/Particles")
        # the filter doesn't make a difference for the error, just for me to test that the unpacking works.
        dummy_filter = ParticleFilter(name = "Filter_Topo_candidates", Input = topo_particles,Cut = F.FILTER( (F.PT>0) & (F.CHILD(1,F.PT>0))))

    return SpruceLine(
        name=name,
        algs=[topo_particles, dummy_filter],
        #hlt1_filter_code="HLT_PASS_RE('Hlt1GECPassthroughDecision')",
        hlt2_filter_code="Hlt2Topo3BodyDecision")

Then I run Moore/run lbexec Hlt2Conf.Sprucing_production:excl_spruce_production Moore/Hlt/Hlt2Conf/options/sprucing/lbexec_yamls/excl_spruce_2022_data.yaml

the only change from the committed code is that I add the line to one stream (b2oc_lines.update({"SpruceTopoPassThrough" : Sprucing_get_topo}).

When running the sprucing, I get the following error

b2oc_Spruce_Packer                    ERROR auto LHCb::{anonymous}::Encoder::id(const string&) const : could not locate packedobjectlocation /Event/Spruce/HLT2/Topo_unfiltered_twobody_merger/OutputContainer (configured prefix=/Event/Spruce/) in table for key 0x9ddf8c8a
b2oc_Spruce_Packer                    ERROR Maximum number of errors ( 'ErrorMax':1) reached.
HLTControlFlowMgr                     FATAL Event failed in Node HltPackedBufferWriter/b2oc_Spruce_PackedBufferWriter : Error in algorithm execute
b2oc_Spruce_Packer                    ERROR auto LHCb::{anonymous}::Encoder::id(const string&) const : could not locate packedobjectlocation /Event/Spruce/HLT2/Topo_unfiltered_twobody_merger/OutputContainer (configured prefix=/Event/Spruce/) in table for key 0x9ddf8c8a

In this case, I was trying to persist HLT2 candidates for later use for TISTOS in DaVinci.