Hi! Just uprgaded from 4.4. to 4.5. Had all the problems with this update, such as postgresql-jdbc version and with stripeCount in cli.y . But I managed it, everything works more or less. Now I cannot raise the Cluster compatibility level. The problem is that increasing the level tries to change something in the HE configuration but cannot. This is error massage: Error while executing action: Cannot update cluster because the update triggered update of the VMs/Templates and it failed for the following: HostedEngine. "There was an attempt to change Hosted Engine VM values that are locked." is one of the error(s). To fix the issue, please go to each VM/Template, edit, change the Custom Compatibility Version (or other fields changed previously in the cluster dialog) and press OK. If the save does not pass, fix the dialog validation. After successful cluster update, you can revert your Custom Compatibility Version change (or other changes). If the problem still persists, you may refer to the engine.log file for further details. If i trying to edit HE machine without changing anything i se next error: There was an attempt to change Hosted Engine VM values that are locked/ I think this is linked issues. Log from engine log when i trying to update Cluster version: 2022-05-27 14:20:54,410+06 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (default task-212) [1b8b6b78] EVENT_ID: CLUSTER_CANNOT_UPDATE_VM_COMPATIBILITY_VERSION(12,005), Ca nnot update compatibility version of Vm/Template: [HostedEngine], Message: There was an attempt to change Hosted Engine VM values that are locked. Log from engine log when i trying to save HE configuration without any changing: 2022-05-27 14:34:10,965+06 INFO [org.ovirt.engine.core.bll.UpdateVmCommand] (default task-220) [9cdfe99b-b7a1-46a4-ab3f-fc110b939f08] Lock Acquired to object 'EngineLock:{exclusiveLocks='[HostedEngine= VM_NAME]', sharedLocks='[4d6a0ffb-a221-4ef8-9846-6ada7690e74a=VM]'}' 2022-05-27 14:34:10,968+06 WARN [org.ovirt.engine.core.bll.UpdateVmCommand] (default task-220) [9cdfe99b-b7a1-46a4-ab3f-fc110b939f08] Validation of action 'UpdateVm' failed for user admin@internal-auth z. Reasons: VAR__ACTION__UPDATE,VAR__TYPE__VM,VM_CANNOT_UPDATE_HOSTED_ENGINE_FIELD 2022-05-27 14:34:10,969+06 INFO [org.ovirt.engine.core.bll.UpdateVmCommand] (default task-220) [9cdfe99b-b7a1-46a4-ab3f-fc110b939f08] Lock freed to object 'EngineLock:{exclusiveLocks='[HostedEngine=VM_ NAME]', sharedLocks='[4d6a0ffb-a221-4ef8-9846-6ada7690e74a=VM]'}' It is not clear what is happening and what changes to the configuration are trying to be saved and what to do about it. Help please.