Bonjour,

J'ai migré Symfony vers la version 5.0. Lorsque je lance le serveur, tout se passe correctement : je n'ai pas d'erreur.

Cependant, lorsque j'effectue une action avec Composer (par exemple composer remove tattali/calendar-bundle), j'obtiens les reuurs suivantes :

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C:\cmder\roadtrip>composer remove tattali/calendar-bundle
Dependency "symfony/framework-bundle" is also a root requirement, but is not explicitly whitelisted. Ignoring.
Loading composer repositories with package information
Updating dependencies (including require-dev)
Restricting packages listed in "symfony/symfony" to "5.0.*"
Your requirements could not be resolved to an installable set of packages.
 
  Problem 1
    - The requested package symfony/console (locked at v4.4.4, required as 5.0.*) is satisfiable by symfony/console[v4.4.4] but these conflict with your requirements or minimum-stability.
  Problem 2
    - The requested package symfony/dotenv (locked at v4.4.4, required as 5.0.*) is satisfiable by symfony/dotenv[v4.4.4] but these conflict with your requirements or minimum-stability.
  Problem 3
    - The requested package symfony/filesystem (locked at v4.4.4, required as 5.0.*) is satisfiable by symfony/filesystem[v4.4.4] but these conflict with your requirements or minimum-stability.
  Problem 4
    - The requested package symfony/form (locked at v4.4.4, required as 5.0.*) is satisfiable by symfony/form[v4.4.4] but these conflict with your requirements or minimum-stability.
  Problem 5
    - The requested package symfony/framework-bundle (locked at v4.4.4, required as 5.0.*) is satisfiable by symfony/framework-bundle[v4.4.4] but these conflict with your requirements or minimum-stability.
  Problem 6
    - The requested package symfony/intl (locked at v4.4.4, required as 5.0.*) is satisfiable by symfony/intl[v4.4.4] but these conflict with your requirements or minimum-stability.
  Problem 7
    - The requested package symfony/property-access (locked at v4.4.4, required as 5.0.*) is satisfiable by symfony/property-access[v4.4.4] but these conflict with your requirements or minimum-stability.
  Problem 8
    - The requested package symfony/security-bundle (locked at v4.4.4, required as 5.0.*) is satisfiable by symfony/security-bundle[v4.4.4] but these conflict with your requirements or minimum-stability.
  Problem 9
    - The requested package symfony/serializer (locked at v4.4.4, required as 5.0.*) is satisfiable by symfony/serializer[v4.4.4] but these conflict with your requirements or minimum-stability.
  Problem 10
    - The requested package symfony/translation (locked at v4.4.4, required as 5.0.*) is satisfiable by symfony/translation[v4.4.4] but these conflict with your requirements or minimum-stability.
  Problem 11
    - The requested package symfony/validator (locked at v4.4.4, required as 5.0.*) is satisfiable by symfony/validator[v4.4.4] but these conflict with your requirements or minimum-stability.
  Problem 12
    - The requested package symfony/var-dumper (locked at v4.4.4, required as 5.0.*) is satisfiable by symfony/var-dumper[v4.4.4] but these conflict with your requirements or minimum-stability.
  Problem 13
    - The requested package symfony/yaml (locked at v4.4.4, required as 5.0.*) is satisfiable by symfony/yaml[v4.4.4] but these conflict with your requirements or minimum-stability.
  Problem 14
    - ocramius/package-versions 1.5.1 requires php ^7.3.0 -> your PHP version (7.2.27) does not satisfy that requirement.
    - ocramius/package-versions 1.5.1 requires php ^7.3.0 -> your PHP version (7.2.27) does not satisfy that requirement.
    - ocramius/package-versions 1.5.1 requires php ^7.3.0 -> your PHP version (7.2.27) does not satisfy that requirement.
    - Installation request for ocramius/package-versions (locked at 1.5.1) -> satisfiable by ocramius/package-versions[1.5.1].
 
 
Removal failed, reverting ./composer.json to its original content.
Qurelqu'un pourrait m'aiguiller sur la manière d'agir?

Merci d'avance pour votre aide.