How do I edit serialized values in "config" and "key_value" tables? While trying to switch original language of a Commerce product type I've encountered longblob serialized data in config and key_value database tables.
Is there a quick way to edit them, possibly without writing a lot of PHP code?
Don't edit the serialized config, edit the config as YAML. Try for example
drush cedit
See other options (UI and command line) here: https://www.drupal.org/docs/configuration-management