[ovirt-users] ovirt-node-ng update to 4.2.5 failed

Hello, I tried to update a ovirt-ng-node from 4.2.4 via the engine and it failed, I also tried using "yum update ovirt-node-ng-image-update". What is the correct way to update a node and how do I delete old layers Thanks, Paul S. The output from "nodectl info" is layers: ovirt-node-ng-4.2.4-0.20180626.0: ovirt-node-ng-4.2.4-0.20180626.0+1 ovirt-node-ng-4.1.9-0.20180124.0: ovirt-node-ng-4.1.9-0.20180124.0+1 ovirt-node-ng-4.2.5.1-0.20180731.0: ovirt-node-ng-4.2.5.1-0.20180731.0+1 bootloader: default: ovirt-node-ng-4.2.4-0.20180626.0+1 entries: ovirt-node-ng-4.2.4-0.20180626.0+1: index: 0 title: ovirt-node-ng-4.2.4-0.20180626.0 kernel: /boot/ovirt-node-ng-4.2.4-0.20180626.0+1/vmlinuz-3.10.0-862.3.3.el7.x86_64 args: "ro crashkernel=auto rd.lvm.lv=onn/ovirt-node-ng-4.2.4-0.20180626.0+1 rd.lvm.lv=onn/swap rhgb quiet LANG=en_GB.UTF-8 img.bootid=ovirt-node-ng-4.2.4-0.20180626.0+1" initrd: /boot/ovirt-node-ng-4.2.4-0.20180626.0+1/initramfs-3.10.0-862.3.3.el7.x86_64.img root: /dev/onn/ovirt-node-ng-4.2.4-0.20180626.0+1 ovirt-node-ng-4.1.9-0.20180124.0+1: index: 1 title: ovirt-node-ng-4.1.9-0.20180124.0 kernel: /boot/ovirt-node-ng-4.1.9-0.20180124.0+1/vmlinuz-3.10.0-693.11.6.el7.x86_64 args: "ro crashkernel=auto rd.lvm.lv=onn/ovirt-node-ng-4.1.9-0.20180124.0+1 rd.lvm.lv=onn/swap rhgb quiet LANG=en_GB.UTF-8 img.bootid=ovirt-node-ng-4.1.9-0.20180124.0+1" initrd: /boot/ovirt-node-ng-4.1.9-0.20180124.0+1/initramfs-3.10.0-693.11.6.el7.x86_64.img root: /dev/onn/ovirt-node-ng-4.1.9-0.20180124.0+1 current_layer: ovirt-node-ng-4.2.4-0.20180626.0+1