ACTFWGenericFatrasExample with doc options creates duplicate particle.csv files

Hi, new to Acts, running the generic Fatras example with the options advised in the doc:

    <build>/bin/ACTFWGenericFatrasExample \
      --evg-input-type=pythia8 \
      --evg-pileup=50 \
      --output-dir=sim \
      --output-csv=1 \
      --events=10

In the sim directory appear the cells, hits, particles, truth csv files familiar from the TrackML challenge. Each event has an additional "event0000000nn-fatras-particles.csv" duplicate to "event0000000nn-fatras-particles.csv".

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information