# Redundant Backup Setup Issue: Master and backup are incompatible due to differences between installed modules **URL:** \ **Category:** Ignition\ **Created:** [July 17, 2020, 1:38pm UTC](https://forum.inductiveautomation.com/t/redundant-backup-setup-issue-master-and-backup-are-incompatible-due-to-differences-between-installed-modules/36823 "2020-07-17T13:38:55Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![mazeyrat](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mazeyrat/32/10955_2.png) [@mazeyrat](https://forum.inductiveautomation.com/u/mazeyrat)\ **Post date:** [July 17, 2020, 4:14pm UTC](https://forum.inductiveautomation.com/t/redundant-backup-setup-issue-master-and-backup-are-incompatible-due-to-differences-between-installed-modules/36823/3 "2020-07-17T16:14:00Z")
If you use Ignition 8, we encounter such of issue with our third party modules. The fix is here: ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/2/e/2e49f929cc5460d5971095984170f803aa5e2259.png) > [@Nightly 8.0 Changelogs - 2020](http://forum.inductiveautomation.com/t/nightly-8-0-changelogs-2020/31153/109): > > Nightly Changelog: 8.0.15-b20200707 Ignition Platform 16547: Add argument to system.util.invokeAsync in all scopes to set task description Added a ‘description’ argument to system.util.invokeAsynchronous, which allows you to set the description of the asynchronous thread, to view on the script diagnostics pages for your current scope. Vision 16729: Equipment Schedule: Unhelpful error if pctDone or leadTime columns in scheduled events dataset contains null values Prevented a null pointer exce… --- _[View the full topic](https://forum.inductiveautomation.com/t/redundant-backup-setup-issue-master-and-backup-are-incompatible-due-to-differences-between-installed-modules/36823)._