PHP Fatal error 컴포저 관련 에러

에러

[ubuntu@-]: PHP Fatal error: Class UpdateHelper\ComposerPlugin_composer_tmp0 contains 2 abstract methods and must therefore be declared abstract or implement the remaining methods (Composer\Plugin\PluginInterface::deactivate, Composer\Plugin\PluginInterface::uninstall) in phar:///usr/local/bin/composer/src/Composer/Plugin/PluginManager.php(274) : eval()'d code on line 11
[ubuntu@-]: Fatal error: Class UpdateHelper\ComposerPlugin_composer_tmp0 contains 2 abstract methods and must therefore be declared abstract or implement the remaining methods (Composer\Plugin\PluginInterface::deactivate, Composer\Plugin\PluginInterface::uninstall) in phar:///usr/local/bin/composer/src/Composer/Plugin/PluginManager.php(274) : eval()'d code on line 11
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1차 솔루션

rm -rf vendor
rm -f composer.lock
composer install

해결 안되고 동일현상 발생

rm -rf vendor
rm -f composer.lock
composer update --prefer-source

2차 솔루션

해결 안되고 동일현상 발생

composer 버전을 2로 업그레이드하면서 새로 생긴 kylekatarnls 패키지의 영향으로 에러 발생한 것으로 추측됨

composer 버전 1로 다운그레이드 하니 정상 배포 성공함