Your lock file does not contain a compatible set of packages. Please run composer update. Problem 1 - city-of-helsinki/drupal-helfi-kasvatus-koulutus is present at version dev-b3d93d02941ab3778ae2c851c30cd52c4a3830fb and cannot be modified by Composer - city-of-helsinki/drupal-helfi-kasvatus-koulutus dev-b3d93d02941ab3778ae2c851c30cd52c4a3830fb conflicts with drupal/variationcache 1.3.0. - drupal/variationcache is locked to version 1.3.0 and an update of this package was not requested.