UUID mismatch is painful when you try to migrate config between Drupal websites. If you sync the UUID between the website the config sync becomes very easy.
UUID sync using DRUSH :
1. Go to your source website root using drush use below command
drush cget system.site uuid
2. This command will return you UUID of source website something like:
uuid: da02566d-3075-425c-a435-4f5edc1d7d19 Copy this alpha numeric value.