==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): 0.9.5-1
- Deployed with iRedMail Easy or the downloadable installer? downloadable
- Linux/BSD distribution name and version: CentOS Linux 7.2.1511
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Apache
- Manage mail accounts with iRedAdmin-Pro? No
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

I've got to do a lot of upgrading to get to the recent version.  I see instructions like this in some of the steps where the referenced version isn't available:  Upgrade iRedAdmin (open source edition) to the latest stable release (0.8)

Since my plan is to go through each step as required from 0.9.5-1 to 1.4.0 Can I skip the upgrades of iRedAPD, iRedAdmin, and Roundcube in each upgrade step and wait until the last one to upgrade those?