<div dir="ltr"><div class="gmail_default" style="font-size:large">Hi everyone!,</div><div class="gmail_default" style="font-size:large">I&#39;ve been running into this error every time I try to upgrade to version 4.0 ([ ERROR ] Failed to execute stage &#39;Setup validation&#39;: Trying to upgrade from unsupported versions: 3.5). There&#39;s an excerpt below of the engine- setup output:</div><div class="gmail_default" style="font-size:large"><div class="gmail_default"><br></div><div class="gmail_default"> INFO  ] Stage: Setup validation</div><div class="gmail_default">[ ERROR ] Failed to execute stage &#39;Setup validation&#39;: Trying to upgrade from unsupported versions: 3.5</div><div class="gmail_default">[ INFO  ] Stage: Clean up</div><div class="gmail_default">          Log file is located at /var/log/ovirt-engine/setup/ovirt-engine-setup-20160630150931-ahkjnm.log</div><div class="gmail_default">[ INFO  ] Generating answer file &#39;/var/lib/ovirt-engine/setup/answers/20160630151045-setup.conf&#39;</div><div class="gmail_default">[ INFO  ] Stage: Pre-termination</div><div class="gmail_default">[ INFO  ] Stage: Termination</div><div class="gmail_default">[ ERROR ] Execution of setup failed</div><div><br></div></div><div class="gmail_default" style="font-size:large">I&#39;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&quot; doesn&#39;t allow me:</div><div class="gmail_default" style="font-size:large"><div class="gmail_default"><br></div><div class="gmail_default">Resolving Dependencies</div><div class="gmail_default">--&gt; Running transaction check</div><div class="gmail_default">---&gt; Package ovirt-engine-setup.noarch 0:3.6.7.5-1.el7.centos will be a downgrade</div><div class="gmail_default">--&gt; 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</div><div class="gmail_default">---&gt; Package ovirt-engine-setup.noarch 0:4.0.0.6-1.el7.centos will be erased</div><div class="gmail_default">--&gt; Finished Dependency Resolution</div><div class="gmail_default">Error: Package: ovirt-engine-setup-3.6.7.5-1.el7.centos.noarch (ovirt-3.6)</div><div class="gmail_default">           Requires: ovirt-engine-setup-plugin-ovirt-engine = 3.6.7.5-1.el7.centos</div><div class="gmail_default">           Installed: ovirt-engine-setup-plugin-ovirt-engine-4.0.0.6-1.el7.centos.noarch</div></div><div class="gmail_default" style="font-size:large"><br></div><div class="gmail_default" style="font-size:large"><div class="gmail_default">Currently I&#39;m not able to start the ovirt-engine service nor go back to version 3.6. </div><div class="gmail_default">Any helps are more than welcome,</div><div class="gmail_default">Ariel</div></div></div>