[Rollback Plan] Upgrade from 8.6 to 9.2.1

[soporteip]

Hi.
Im running Plesk Control Panel 8.6.x on a Windows 2003 Server Enterprise Edition (SP2).
I'm going to upgrade to version 9.2.1 and im planning all, so before i run the upgrade, i want to know:
¿Is there any Rollback plan i can use in case of a failure during or after the instalattion is done?

I've looked in the Knowledge base but i couldnt be able to found anything like that.
Thanks in advance.

Bye.

PD: Sorry for my poor English.

[soporteip]

Hi!
Sorry to bother again with this, but can someone help me with this please?
Thanks.

Bye!

[soporteip]

Hi!
Is there any rollback plan i could use?

Thanks in advance.
Bye.