IDES Upgrade

Hi,

We have IDES on EhP3.

Note 799639 says that applying enhancement packs to an IDES system is possible.

However, we've faced several issues when upgrading IDES in the past.

Is it really possible to upgrade EhP3 IDES to EhP5 IDES ?

or will we have to install a fresh EhP5 IDES system ?

Thank you