Sylius 2, Symfony 7 and PHP 8 : AbstractLoader.php:104 “Unknown named parameter $value” on clear:cache

When I run bin/console cache:clear in my Sylius 2 / Symfony 7 project, I get a fatal error during the Validator cache warming phase:

bin/console c:c
CRITICAL [php] Uncaught Error: Unknown named parameter $value
# in vendor/symfony/validator/Mapping/Loader/AbstractLoader.php line 104
SymfonyComponentValidatorMappingLoaderAbstractLoader->newConstraint()
SymfonyComponentValidatorMappingLoaderXmlFileLoader->parseConstraints()
...

It appears that the XML loader is trying to instantiate a Constraint class with a named $value argument that doesn’t exist in its constructor.