duplicated property name 'DD4hepSvc'

A number of tests are failing with warnings like

PrForwardTrackingVelo_6c661b6e.P... WARNING duplicated property name 'DD4hepSvc', see https://its.cern.ch/jira/browse/GAUDI-1023

see e.g.

https://lhcb-nightlies.web.cern.ch/nightly/lhcb-master/2115/Moore/x86_64_v2-centos7-gcc12-dbg/tests#RecoConf_hlt2_run_two_recos

@sponce @bcouturi An ideas what is causing this ?

@graven I could be wrong but I vaguely remember discussion this with you a while back and you had some idea why it was happening ?

FYI @decianm @cmarinbe @mveghel @dovombru