Question Update Plesk 12.0.18 to Plesk Onyx 17.5.3

[root_s]

CentOS 6.9 Plesk 12.0.18
OVH VPS
A task : Update Plesk 12.0.18 to Plesk Onyx 17.5.3

Download wget https://autoinstall.plesk.com/PSA_17.5.3/examiners/panel_preupgrade_checker.php
Run /usr/local/psa/admin/bin/php panel_preupgrade_checker.php

Result :

Errors found: 0; Warnings found: 1

[2017-10-04 09:31:45][INFO] STEP 26: Checking for custom web server configuration templates...
[2017-10-04 09:31:45][WARNING] There are custom web server configuration templates at /usr/local/psa/admin/conf/templates/custom. These custom templates might be incom
patible with a new Plesk version, and this might lead to failure to generate web server configuration files.Please check Apache config file cannot be generated: "Wrong variable to subsitute" for details.

Recommendations:

1. Recreate all Apache configuration files:
   # /usr/local/psa/admin/sbin/httpdmng --reconfigure-all

As a workaround solution, move the custom templates folder to another location and recreate all Apache configuration files:

# mv -f /usr/local/psa/admin/conf/templates/custom /root/custom_templates/
# /usr/local/psa/admin/sbin/httpdmng --reconfigure-all

Question :

Do not disturb the work of sites