applicable for OXID 6.2 to 6.5.1
composer require cweagans/composer-patches
"extra": { "patches": { "oxid-esales/oxideshop-ce": { "sessionid fix": "https://git.d3data.de/D3Public/oxid_patches/raw/branch/sessionid/sessionid.patch" } }, "enable-patching": true },
rm -rf ./vendor/oxid-esales/oxideshop-ce composer install
Enjoy!