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If you have the error as in the title of this page this solution can help you.

In our case, this error happened when we synchronize live DB in dev DB.

The solution

Before anything action, you must make backup your DB

Run the SQL  two queries below

DELETE core_config_data FROM core_config_data

LEFT JOIN store_website ON core_config_data.scope_id = store_website.website_id

WHERE core_config_data.scope='websites' AND store_website.website_id IS NULL;

DELETE core_config_data FROM core_config_data

LEFT JOIN store ON core_config_data.scope_id = store.store_id

WHERE core_config_data.scope='stores' AND store.store_id IS NULL;

After run these queries the error should go away