thanks for the reply.
I was a bit in a hurry though lxd did not start, copy worked OK. So managed to lxd remote copy these to remote server and move them back later.
zfs mount zpooldata3/lxd/containers/bionic-selenium
zfs mount zpooldata3/lxd/containers/xenial-b
zfs mount zpooldata3/lxd/containers/trusty-android
lxd import bionic-selenium
lxd import xenial-b
lxd import trusty-android
after this add remote.
copy to remote
purge my local LXD
install from backports 3.0.1
Copy back everything from remote
Finally did this so that next time I save my time
Thanks a lot…