KalmanFilterToolExample has "Duplicated property name 'DD4hepSvc'"

See e.g.

https://lhcb-nightlies.web.cern.ch/nightly/lhcb-master/2131/Moore/x86_64_v2-centos7-gcc12-opt/tests#RecoConf_hlt2_pr_kf_tool_example

Has a bunch of warnings like

PrKalmanFilterToolVelo_v1_ee8de9... WARNING duplicated property name 'DD4hepSvc', see https://its.cern.ch/jira/browse/GAUDI-1023

@gunther I believe you authored this component, can you take a look please ?

My suspicion is it is related to the use of LHCb::Algorithm::IOHelper from

https://gitlab.cern.ch/lhcb/LHCb/-/blob/master/Kernel/LHCbAlgs/include/LHCbAlgs/LHCbAlgsHelpers.h

Which @decianm you authored, so could you please also take a look, thanks ?