I've already try with new rules (with a factoryreset).
I've also try to move the SD-WAN rules (to change order) but i've still the problem (Failed to save changes). When I move a rule, nothing happens from SSH diagnose side.
When I update a rule, i've been the command with this result :
write config file success, prepare to save in flash
[__create_file_new_version:274] the new version config file '/data/./config/sys_vd_root+root.conf.gz.v000000016' is created [symlink_config_file:341] a new version of '/data/./config/sys_vd_root+root.conf.gz' is created: /data/./config/sys_vd_root+root.conf.gz.v000000016 [symlink_config_file:385] the old version '/data/./config/sys_vd_root+root.conf.gz.v000000015' is deleted [symlink_config_file:387] '/data/./config/sys_vd_root+root.conf.gz' has been symlink'ed to the new version '/data/./config/sys_vd_root+root.conf.gz.v000000016'. The old version '/data/./config/sys_vd_root+root.conf.gz.v000000015' has been deleted zip config file /data/./config/sys_vd_root+root.conf.gz success!
I've also try with downgraded to the firmware 7.2.0 and that's works with this version !
So what's happening from 7.2.0 to 7.2.1 and 7.2.2 with sd-wan ??!!
The only changes I see is the ipv6 all on the implicit default rule :
The Fortinet Security Fabric brings together the concepts of convergence and consolidation to provide comprehensive cybersecurity protection for all users, devices, and applications and across all network edges.