PVE - Can't lock file

Can't lock file 

 https://dannyda.com/2020/05/1 1/how-to-fix-proxmox-pve-cant-lock-file-var-lock-qemu-server-lock-xxx-conf-got-timeout-proxmox-cant-shutdown-virtual-machine/ 

 manual SSH: 

 goto /run/lock/qemu-server 

 delete lock-xxx.conf 

 qm unlock xxx 

 Simple script: 

 #!/bin/sh

echo

echo '-----AUTHOR: https://dannyda.com-----'

echo

echo '---Existing locks---'

qm unlock $1

ls -l /run/lock/qemu-server

rm -f /run/lock/qemu-server/lock-$1.conf

qm unlock $1

echo

echo '---Remaining locks---'

ls -l /run/lock/qemu-server 

 ./killvm.sh xxx