Multiple ibexa repos like ibexa/core-persistence, ibexa/notifications have had composer.json templates added that specify

"symfony/event-dispatcher": "^5.4",
"symfony/event-dispatcher-contracts": "^2.2",

This creates conflict if using another bundle that uses "symfony/event-dispatcher-contracts": "^3"

The symfony/event-dispatcher itself restricts "symfony/event-dispatcher-contracts": "^2 || ^3" allowing version 3+

The limitation of ^2.2 looks arbitrary and should be removed as symfony/event-dispatcher already defines the allowed version.

Also for a repo like ibexa/core-persistence, the dispatcher isn't even used.