Root ssh link fail to LXC Container

Environment: PVE 7.2,
LXC container: debian 11 (ip 192.168.0.182)
root ssh login in PVE node , successful.

issue: root ssh login in LXC container / debian 11 failed "permission denied (publickey,password)"
double checked, password for root is right.

try to fix by modify sshd_config
vim /etc/ssh/sshd_config
PermitRootLogin yes
and restart ssh service service sshd restart

root ssh login in failed again with "permission denied (publickey,password)"...

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