Symfony version(s) affected: 5.2.6

Description
When preload is enabled, ErrorException is thrown.
Warning: Cannot declare class Symfony\Component\Security\Core\Authorization\DebugAccessDecisionManager, because the name is already in use

How to reproduce
Install current version of symfony/security-bundle and enable preload.

Possible Solution
Something like this, maybe:

if (!class_exists(DebugAccessDecisionManager::class)) {
    class_alias(TraceableAccessDecisionManager::class, DebugAccessDecisionManager::class);
}