Sync : failed to parse JSON "monetaryMass"

With Duniter 1.7.11 or 1.7.12 with a reset data and sync, launching durs sync in release modes panics when parsing monetaryMass. It's expected to be a number, but it's null in mine.

@elois JSON chunk however contains a 0. This file is generated by Duniter, so it might by a Duniter bug. Can someone try a Duniter reset data and sync (or in a fresh install) and verify if monetaryMass is 0 or null

$ cat ~/.config/duniter/duniter_default/g1/chunk_0-250.json| grep monetaryMass | head -n 5
   "monetaryMass": null,
   "monetaryMass": 59000,
   "monetaryMass": 59000,
   "monetaryMass": 59000,
   "monetaryMass": 59000,

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