Symfony version(s) affected

6.3.0

Description

Secrets can be overridden by environmental variables as mentioned in https://symfony.com/doc/current/configuration/secrets.html#referencing-secrets-in-configuration-files

If you need some different values on your local machine you can also create a local secret, which will in turn update .env.{env}.local file
https://symfony.com/doc/current/configuration/secrets.html#local-secrets-overriding-secrets-locally

But since 6.3 release, this behavior is broken if you are overriding a secret value with an empty value or null

How to reproduce

1. Create a secret value with php bin/console secrets:set DATABASE_PASSWORD
2. Override this secret value with help of .env file, to a null or empty string value
3. Set this secret/env to a parameter as mentioned in https://symfony.com/doc/current/configuration/secrets.html#referencing-secrets-in-configuration-files
4. Check secret value php bin/console secrets:list --reveal
5. Check parameter value in controller

Possible Solution

This bug is introduced by https://github.com/symfony/symfony/pull/48705/files

Additional Context

Possible link to
#50094
#50101
#48705
#50301
#50712