**Symfony version(s) affected**: 4.4.0 **Description** Hello. Next error from 4.3 to 4.4. My monolith throws an exception after upgrading to 4.4 about security. `Not configuring explicitly the provider for the "anonymous" listener on "main" firewall is ambiguous as there is more than one registered provider.` In SF 4.3 everything works fine. I have not noticed any changes in this topic in the history of changes. **How to reproduce** My security.yaml looks like: ``` security: providers: intranet_users: entity: { class: SOME\ENTITY\CLASS, property: email } rest_api_provider: memory: users: SOME_REST_LOGIN: { password: SOME_REST_PASSWORD, roles: 'ROLE_REST_API_USER' } firewalls: dev: pattern: ^/(_(profiler|wdt)|css|images|js)/ security: false api: pattern: ^/(webservices/rest/) provider: rest_api_provider anonymous: false http_basic: realm: 'SOME DESCRIPTION' main: anonymous: ~ ```