I did manage to restart incus following what was in this post.
/etc/lvm/lvm.conf changing thin_check_options = [ “-q”, “--clear-needs-check-flag” ] modify the flag to --auto-repair so it becomes thin_check_options = [ “-q”, “–auto-repair” ]
EDIT : sorry for multiple posts, I’ll try inform here how I got everything up, but I guess I’m gonna have to redo everything, I really never managed to understand how incus & lvm works as I always have problems with it and with space left in my volumes/thinpool etc :
pvs
PV VG Fmt Attr PSize PFree
/dev/mapper/nvme0n1p3_crypt tatati-vg lvm2 a-- 406.17g 0