Using the solution given by apaderno, I was able to import my config from another site which is an easy way to keep content types from a project to another for instance.

1. Copy UUID from another site. You can find it in system.site.yml or get it with

     drush config-get "system.site" uuid 

2. Change the UUID with

    drush config-set "system.site" uuid [uuid].

Of course troubles are to be expected if you try this one sites using different versions of drupal

If anyone think this is a bad idea, please let me know why.

Using the solution given by apaderno, I was able to import my config from another site which is an easy way to copy content types from a project to another for instance.

1. Copy UUID from another site. You can find it in system.site.yml or get it with

   drush config-get "system.site" uuid

2. Change the UUID with

   drush config-set "system.site" uuid [uuid]

Of course troubles are to be expected if you try this on sites using different versions of Drupal.

If anyone think this is a bad idea, please let me know why.