Sage, Not during the network flap or before flap , but after i had already tried the ceph-objectstore-tool remove export with no possibility to do it. And conf file never had the "ignore_les" option. I was even not aware of the existence of this option and seem that it preferable to forget that it inform me about it immediately :-) Kr Philippe. On Mon, 4 Feb 2019, Sage Weil wrote: > On Mon, 4 Feb 2019, Philippe Van Hecke wrote: > > Hi Sage, First of all tanks for your help > > > > Please find here https://filesender.belnet.be/?s=download&token=dea0edda-5b6a-4284-9ea1-c1fdf88b65e9 Something caused the version number on this PG to reset, from something like 54146'56789376 to 67932'2. Was there any operator intervention in the cluster before or during the network flapping? Or did someone by chance set the (very dangerous!) ignore_les option in ceph.conf? sage