How to fix "non-existent config entity name" in Drupal 8 & 9

How to fix "non-existent config entity name returned by FieldStorageConfigInterface::getBundles()" in Drupal 8 & 9

Code snippet that can be used to fix "non-existent config entity name returned by FieldStorageConfigInterface::getBundles()" in Drupal 8 & 9

Example of issue:

views throws warnings similar to "A non-existent config entity name returned by FieldStorageConfigInterface::getBundles(): field name: field_dates, bundle: page" for fields that are in the entity bundle field field map that no longer exist on the site. We had a handful of these fields which threw warnings on every cache clear. To fix this, simply add an update hook which clears out these stale fields from the entity.definitions.bundle_field_map keyvalue collection:

/**
 * Fix entity.definitions.bundle_field_map key store with old bundles.
 */
function my_module_update_8001() {

  /** @var \Drupal\Core\KeyValueStore\KeyValueFactoryInterface $key_value_factory */
  $key_value_factory = \Drupal::service('keyvalue');

  $field_map_kv_store = $key_value_factory->get('entity.definitions.bundle_field_map');

  $node_map = $field_map_kv_store->get('node');
 
 // Remove the field_dates field from the bundle field map for the page bundle.
  unset($node_map['field_dates']['bundles']['page']);

  $field_map_kv_store->set('node', $node_map);
}

Example 2

/**
 * Fix entity.definitions.bundle_field_map key store with old bundles.
 */
function my_module_update_8001() {
  /** @var \Drupal\Core\KeyValueStore\KeyValueFactoryInterface $key_value_factory */
  $key_value_factory = \Drupal::service('keyvalue');
  $field_map_kv_store = $key_value_factory->get('entity.definitions.bundle_field_map');
  $node_map = $field_map_kv_store->get('node');
  // Remove the field_dates field from the bundle field map for the page bundle.
  unset($node_map['field_dates']['bundles']['page']);
  $field_map_kv_store->set('node', $node_map);
}

Example 3:

function my_module_update_8002() {
    $entity_type = 'node';
    $bundle = 'article';
    $field_name = 'field_description';

    /** @var \Drupal\Core\KeyValueStore\KeyValueFactoryInterface $key_value_factory */
    $key_value_factory = \Drupal::service('keyvalue');
    
    $field_map_kv_store = $key_value_factory->get('entity.definitions.bundle_field_map');

    $map = $field_map_kv_store->get($entity_type);

    // Remove the field_fpimage field from the bundle gallery_assist for the page bundle.
    unset($map[$field_name]['bundles'][$bundle]);

    $field_map_kv_store->set($entity_type, $map);

}

Example for comment entity. I have this error when migrate d7 to d8:

A non-existent config entity name returned by FieldStorageConfigInterface::getBundles(): entity type: comment, bundle: comment_node_schools_and_colleges, field name: comment_body

function my_module_update_8001() {
  /** @var \Drupal\Core\KeyValueStore\KeyValueFactoryInterface $key_value_factory */
  $key_value_factory = \Drupal::service('keyvalue');
  $field_map_kv_store = $key_value_factory->get('entity.definitions.bundle_field_map');
  $comment_map = $field_map_kv_store->get('comment');
  // Remove the field_dates field from the bundle field map for the page bundle.
  unset($comment_map['comment_body']['bundles']['comment_node_schools_and_colleges']);
  $field_map_kv_store->set('comment', $comment_map);
}

Example for Commerce Product entity.:

entity type : commerce_product, bundle: product, field name : field_deadline
entity type : commerce_product, bundle: product, field name : commerce_stock_override
entity type : commerce_product, bundle: product, field name : commerce_stock

function my_module_update_8001() {
  /** @var \Drupal\Core\KeyValueStore\KeyValueFactoryInterface $key_value_factory */
  $key_value_factory = \Drupal::service('keyvalue');
  $field_map_kv_store = $key_value_factory->get('entity.definitions.bundle_field_map');
  $node_map = $field_map_kv_store->get('commerce_product');
  
  // Remove the field_deadline field from the bundle field map for the page bundle.
  unset($node_map['field_deadline']['bundles']['product]);
  
   // Remove the commerce_stock_override field from the bundle field map for the page bundle.
  unset($node_map['commerce_stock_override']['bundles']['product']);
  
   // Remove the commerce_stock field from the bundle field map for the page bundle.
  unset($node_map['commerce_stock']['bundles']['product']);
  
  $field_map_kv_store->set('node', $node_map);
}

Example with Paragraph module:

function my_module_update_8001() {
  ## Fixes:
  ## A non-existent config entity name returned by FieldStorageConfigInterface::getBundles(): entity type: paragraph, bundle: text, field name: field_image
  $entity_type = 'paragraph';
  $bundle = 'text';
  $field_name = 'field_image';

  /** @var \Drupal\Core\KeyValueStore\KeyValueFactoryInterface $key_value_factory */
  $key_value_factory = \Drupal::service('keyvalue');
  $field_map_kv_store = $key_value_factory->get('entity.definitions.bundle_field_map');
  $map = $field_map_kv_store->get($entity_type);
  // Remove the field_dates field from the bundle field map for the page bundle.
  unset($map[$field_name]['bundles'][$bundle]);
  $field_map_kv_store->set($entity_type, $map);
}

After that, just you need to enable the module, and call the /update.php, clean the cache and now the error is gone.