config-import error: These entities need to be deleted before importing I have two Drupal environments with the same system.site:uuid

In the main Drupal I export the configuration with command:

drush config-export deploy -y


In the destination drupal I import the configuration with command:

drush config-import deploy -y


But I have this error


  Entities exist of type Shortcut link and
   Default.
  These entities need to be deleted before importing.


And:


  Unable to install the mytest theme since
  it does not exist.


My test was a test for create subtheme, but then I delete mytest form drupal. And I don't know what it exports now, and, placeholder I don't Know what is it

I followed this article And I have the same issue of this comment
For:


  Entities exist of type Shortcut link and Default. These entities need
  to be deleted before importing.


You need delete the entities of type short-cut, you can do with drush:

drush ev '\Drupal::entityManager()-&gt;getStorage("shortcut_set")-&gt;load("default")-&gt;delete();'