# Error: Upgrading custom objects to mautic 4.4.11

**URL:** https://forum.mautic.org/t/error-upgrading-custom-objects-to-mautic-4-4-11/30735
**Category:** Product Support
**Tags:** mautic-4
**Created:** [January 31, 2024, 1:12pm UTC](https://forum.mautic.org/t/error-upgrading-custom-objects-to-mautic-4-4-11/30735 "2024-01-31T13:12:39Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![jhjunior](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/jhjunior/32/2806_2.png) [@jhjunior](https://forum.mautic.org/u/jhjunior)
#### Post date: [January 31, 2024, 1:12pm UTC](https://forum.mautic.org/t/error-upgrading-custom-objects-to-mautic-4-4-11/30735/1 "2024-01-31T13:12:39Z")

</div>

**Your software**  
_My PHP version is_ : 8.0.30  
_My MySQL/MariaDB version is_ (delete as applicable): MySQL

**Updating/Installing Errors**

_These errors are showing in the Mautic log_ :

```auto
Fatal error: Uncaught Error: Undefined constant Mautic\LeadBundle\LeadEvents::LIST_FILTERS_MERGE in /var/www/html/docroot/plugins/CustomObjectsBundle/EventListener/SegmentFiltersMergeSubscriber.php:27
Stack trace:
#0 /var/www/html/vendor/symfony/event-dispatcher/DependencyInjection/RegisterListenersPass.php(172): MauticPlugin\CustomObjectsBundle\EventListener\SegmentFiltersMergeSubscriber::getSubscribedEvents()
#1 /var/www/html/vendor/symfony/event-dispatcher/EventDispatcher.php(197): Symfony\Component\EventDispatcher\DependencyInjection\ExtractingEventDispatcher::getSubscribedEvents()
#2 /var/www/html/vendor/symfony/event-dispatcher/DependencyInjection/RegisterListenersPass.php(120): Symfony\Component\EventDispatcher\EventDispatcher->addSubscriber(Object(Symfony\Component\EventDispatcher\DependencyInjection\ExtractingEventDispatcher))
#3 /var/www/html/vendor/symfony/dependency-injection/Compiler/Compiler.php(94): Symfony\Component\EventDispatcher\DependencyInjection\RegisterListenersPass->process(Object(Symfony\Component\DependencyInjection\ContainerBuilder))
#4 /var/www/html/vendor/symfony/dependency-injection/ContainerBuilder.php(762): Symfony\Component\DependencyInjection\Compiler\Compiler->compile(Object(Symfony\Component\DependencyInjection\ContainerBuilder))
#5 /var/www/html/vendor/symfony/http-kernel/Kernel.php(594): Symfony\Component\DependencyInjection\ContainerBuilder->compile()
#6 /var/www/html/docroot/app/AppKernel.php(254): Symfony\Component\HttpKernel\Kernel->initializeContainer()
#7 /var/www/html/vendor/symfony/framework-bundle/Console/Application.php(169): AppKernel->boot()
#8 /var/www/html/vendor/symfony/framework-bundle/Console/Application.php(75): Symfony\Bundle\FrameworkBundle\Console\Application->registerCommands()
#9 /var/www/html/vendor/symfony/console/Application.php(149): Symfony\Bundle\FrameworkBundle\Console\Application->doRun(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#10 /var/www/html/bin/console(42): Symfony\Component\Console\Application->run(Object(Symfony\Component\Console\Input\ArgvInput), Object(Symfony\Component\Console\Output\ConsoleOutput))
#11 {main}
  thrown in /var/www/html/docroot/plugins/CustomObjectsBundle/EventListener/SegmentFiltersMergeSubscriber.php on line 27

```

**Your problem**  
_My problem is_ : Upgrading mautic from 4.4.9 to 4.4.11 to solve problems with custom objects.  
4.4.9 (custom objects 0.19) \> 4.4.11 (custom objects 0.27)

_Steps I have tried to fix the problem_ :  
I tried to set branch **staging** and other specific branchs from custom objects repo.

> **[acquia/mc-cs-plugin-custom-objects - Packagist](https://packagist.org/packages/acquia/mc-cs-plugin-custom-objects)**
>
> This plugin adds custom objects feature.

It is proving challenging to understand the correlation between mautic updates and custom objects. There are several filtering problems that I cannot apply the corrections made because all combinations beyond a specific one break and the custom objects project tag has not been updated for a long time.

currently the one that works is version 4.4.9 with custom objects in the 1.0.0 tag. However, this combination has performance problems and several filters do not work.

Where is the most recent working combination described?