How to handle Symfony 5.3 deprecations?

Question

After upgrading Symfony from 4.4 -> 5.3 i get some deprecations which I cant located to solve.

Here are 3 deprecations as example:

User Deprecated: Since symfony/framework-bundle 5.3: The "session.storage.factory.service" service is deprecated, use "session.storage.factory.native", "session.storage.factory.php_bridge" or "session.storage.factory.mock_file" instead.
User Deprecated: Since symfony/security-core 5.3: The "Symfony\Component\Security\Core\Event\AuthenticationFailureEvent" class is deprecated, use "Symfony\Component\Security\Http\Event\LoginFailureEvent"
User Deprecated: Since symfony/http-kernel 5.3: "Symfony\Component\HttpKernel\Event\KernelEvent::isMasterRequest()" is deprecated, use "isMainRequest()" instead.

It's only 3 of more as 30 deprecations. My question is: How is the correct way to solve this warnings. (I need to solve, because I have many Requests/minute and every time this warnings get wrote in dev.log - this file is exploding)

I want to start with the 3rd warning. Here is the trace:

../vendor/symfony/http-kernel/Event/KernelEvent.php:88 {▶}
../vendor/symfony/web-link/EventListener/AddLinkHeaderListener.php:41 {▶}
../vendor/symfony/event-dispatcher/Debug/WrappedListener.php:117 {▶}
../vendor/symfony/event-dispatcher/EventDispatcher.php:230 {▶}
../vendor/symfony/event-dispatcher/EventDispatcher.php:59 {▶}
../vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:151 {▶}
../vendor/symfony/http-kernel/HttpKernel.php:190 {▶}
../vendor/symfony/http-kernel/HttpKernel.php:178 {▶}
../vendor/symfony/http-kernel/HttpKernel.php:79 {▶}
../vendor/symfony/http-kernel/EventListener/ErrorListener.php:60 {▶}
../vendor/symfony/event-dispatcher/Debug/WrappedListener.php:117 {▶}
../vendor/symfony/event-dispatcher/EventDispatcher.php:230 {▶}
../vendor/symfony/event-dispatcher/EventDispatcher.php:59 {▶}
../vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:151 {▶}
../vendor/symfony/http-kernel/HttpKernel.php:218 {▶}
../vendor/symfony/http-kernel/HttpKernel.php:90 {▶}
../vendor/symfony/http-kernel/Kernel.php:199 {▶}
../public/index.php:25 {▶}

All files comes directly from symfony, nothing from me, thats why my question where to start to solve this warnings.