Hi everyone!,

I've been running into this error every time I try to upgrade to version 4.0 ([ ERROR ] Failed to execute stage 'Setup validation': Trying to upgrade from unsupported versions: 3.5). There's an excerpt below of the engine- setup output:

INFO ] Stage: Setup validation

[ ERROR ] Failed to execute stage 'Setup validation': Trying to upgrade from unsupported versions: 3.5

[ INFO ] Stage: Clean up

Log file is located at /var/log/ovirt-engine/setup/ovirt-engine-setup-20160630150931-ahkjnm.log

[ INFO ] Generating answer file '/var/lib/ovirt-engine/setup/answers/20160630151045-setup.conf'

[ INFO ] Stage: Pre-termination

[ INFO ] Stage: Termination

[ ERROR ] Execution of setup failed

I've been googling about this issue but this is one vague reference only. Then if I tried to downgrade to my current version ovirt-engine-setup-3.6.7.5-1.el7.centos.noarch" doesn't allow me:

Resolving Dependencies

--> Running transaction check

---> Package ovirt-engine-setup.noarch 0:3.6.7.5-1.el7.centos will be a downgrade

--> Processing Dependency: ovirt-engine-setup-plugin-ovirt-engine = 3.6.7.5-1.el7.centos for package: ovirt-engine-setup-3.6.7.5-1.el7.centos.noarch

---> Package ovirt-engine-setup.noarch 0:4.0.0.6-1.el7.centos will be erased

--> Finished Dependency Resolution

Error: Package: ovirt-engine-setup-3.6.7.5-1.el7.centos.noarch (ovirt-3.6)

Requires: ovirt-engine-setup-plugin-ovirt-engine = 3.6.7.5-1.el7.centos

Installed: ovirt-engine-setup-plugin-ovirt-engine-4.0.0.6-1.el7.centos.noarch

Currently I'm not able to start the ovirt-engine service nor go back to version 3.6.

Any helps are more than welcome,

Ariel