Error message

• Warning: array_flip(): Can only flip string and integer values, entry skipped in EntityAPIController->load() (line 226 of /var/www/www.perillotours.com/sites/all/modules/entity/includes/entity.controller.inc).
• Warning: array_flip(): Can only flip string and integer values, entry skipped in DrupalDefaultEntityController->cacheGet() (line 391 of /var/www/www.perillotours.com/includes/entity.inc).
• Warning: Undefined array key 16133 in field_collection_entity_preload() (line 1026 of /var/www/www.perillotours.com/sites/all/modules/field_collection/field_collection.module).
• Warning: Cannot modify header information - headers already sent by (output started at /var/www/www.perillotours.com/includes/common.inc:2861) in drupal_send_headers() (line 1554 of /var/www/www.perillotours.com/includes/bootstrap.inc).
• TypeError: array_values(): Argument #1 ($array) must be of type array, null given in array_values() (line 1026 of /var/www/www.perillotours.com/sites/all/modules/field_collection/field_collection.module).