Symfony version(s) affected

7.3

Description

When using the symfony serializer component to save messages data in a database, the deserializer is not able to deserialize the DeduplicateStamp.

Error : Could not decode stamp: The type of the "key" attribute for class "Symfony\Component\Messenger\Stamp\DeduplicateStamp" must be one of "string" ("array" given).

How to reproduce

Reproduction Repo : https://github.com/or-benjamin/Symfony-Messenger-DeduplicateMiddleware-Bug

Possible Solution

No response

Additional Context

No response