docker: error starting docker

[CarlotaVina]

I try to start docker with

sudo systemctl start docker I get the error Error starting daemon: error initializing graphdriver: /var/lib/docker contains several valid graphdrivers: devicemapper, overl

I tried to configure devicemapper. I created the file /etc/docker/daemon.json and I configured with

{ "storage-driver": "devicemapper", "storage-opts": [ "dm.directlvm_device=/dev/xdf", "dm.thinp_percent=95", "dm.thinp_metapercent=1", "dm.thinp_autoextend_threshold=80", "dm.thinp_autoextend_percent=20", "dm.directlvm_device_force=false" ] }

I get an error in line dm.directlvm_device=/dev/xdf" when I start docker. After that I deleted the file/etc/docker/daemon.json

And now, I get this error. How can I fix this issue?