Installation Error with Shopware version 6.4.20.0

Shopware 6 (German)
1

Currently, we are encountering a composer error while setting up Shopware version 6.4.20.0. Could you please assist me with this?
Error

No composer.lock file present. Updating dependencies to latest instead of installing from lock file. See https://getcomposer.org/install for more information.
Loading composer repositories with package information
Updating dependencies
Dependency resolution completed in 0.006 seconds
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Root composer.json requires shopware/conflicts >=0.1.22 -> satisfiable by shopware/conflicts[0.1.22, 0.2.0].
    - Root composer.json requires shopware/core 6.4.20.0 -> satisfiable by shopware/core[6.4.20.0].
    - shopware/conflicts 0.1.22 conflicts with shopware/core <6.5.
    - shopware/conflicts 0.2.0 requires shopware/core >=6.6.4.0 -> found shopware/core[v6.6.4.0, v6.6.4.1, v6.6.5.0, v6.6.5.1, v6.6.6.0, v6.6.6.1, v6.6.7.0] but it conflicts with your root composer.json require (6.4.20.0).
2

Please ask you hosting provider if the used hosting package fulfill the shopware requirements:

Why did you use this old version? This version is outdated: Shopware Release Policy | Shopware Documentation . So please use at least the version 6.5.8.0.

Maybe use a shopware certified hoster: The perfect hosting for your Shopware project | Shopware

For other topics please use the English section of this forum: Shopware 6 (English) - Shopware Community Forum