I have the following tables:


DROP TABLE IF EXISTS `kulibri-big`.`users`;
CREATE TABLE  `kulibri-big`.`users` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `name` varchar(191) COLLATE utf8mb4_unicode_ci NOT NULL,
  `email` varchar(191) COLLATE utf8mb4_unicode_ci NOT NULL,
  `email_verified_at` timestamp NULL DEFAULT NULL,
  `password` varchar(191) COLLATE utf8mb4_unicode_ci NOT NULL,
  `locale` char(2) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT 'de',
  `roles` int(11) NOT NULL DEFAULT '0',
  `login_count` int(11) NOT NULL DEFAULT '0',
  `active` tinyint(1) NOT NULL DEFAULT '0',
  `remember_token` varchar(100) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `customer_id` varchar(191) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `plan` tinyint(4) NOT NULL DEFAULT '0',
  `last_login_at` datetime DEFAULT NULL,
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  `deleted_at` timestamp NULL DEFAULT NULL,
  `promotion_shown` tinyint(1) NOT NULL DEFAULT '0',
  PRIMARY KEY (`id`),
  UNIQUE KEY `users_email_unique` (`email`),
  KEY `users_customer_id_index` (`customer_id`)
) ENGINE=InnoDB AUTO_INCREMENT=186316 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;


DROP TABLE IF EXISTS `kulibri-big`.`polls`;
CREATE TABLE  `kulibri-big`.`polls` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `user_id` bigint(20) unsigned NOT NULL,
  `title` varchar(191) COLLATE utf8mb4_unicode_ci NOT NULL,
  `description` text COLLATE utf8mb4_unicode_ci,
  `bg_image_path` varchar(1000) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `type` int(11) NOT NULL,
  `options` varchar(1000) COLLATE utf8mb4_unicode_ci NOT NULL,
  `deadline` datetime DEFAULT NULL,
  `closed` tinyint(1) DEFAULT '0',
  `key` varchar(20) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  `logo_image_path` varchar(191) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `design_id` bigint(20) unsigned NOT NULL,
  `delay_interval` varchar(191) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `delay_type` varchar(191) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `choice_config` json DEFAULT NULL,
  `isArchive` tinyint(4) NOT NULL DEFAULT '0',
  PRIMARY KEY (`id`),
  KEY `polls_user_id_foreign` (`user_id`),
  CONSTRAINT `polls_user_id_foreign` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=81450 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;



DROP TABLE IF EXISTS `kulibri-big`.`choices`;
CREATE TABLE  `kulibri-big`.`choices` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `poll_id` bigint(20) unsigned NOT NULL,
  `start` datetime DEFAULT NULL,
  `end` datetime DEFAULT NULL,
  `text` varchar(191) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `final` tinyint(1) NOT NULL DEFAULT '0',
  `user_id` bigint(20) unsigned NOT NULL,
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  `limit` tinyint(3) unsigned DEFAULT '0',
  PRIMARY KEY (`id`),
  KEY `choices_user_id_foreign` (`user_id`),
  KEY `choices_poll_id_foreign` (`poll_id`),
  KEY `choices_poll_id_index` (`poll_id`),
  CONSTRAINT `choices_poll_id_foreign` FOREIGN KEY (`poll_id`) REFERENCES `polls` (`id`) ON DELETE CASCADE,
  CONSTRAINT `choices_user_id_foreign` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=495163 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

DROP TABLE IF EXISTS `kulibri-big`.`participants`;
CREATE TABLE  `kulibri-big`.`participants` (
  `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  `poll_id` bigint(20) unsigned NOT NULL,
  `name` varchar(191) COLLATE utf8mb4_unicode_ci NOT NULL,
  `invitation_id` int(11) DEFAULT NULL,
  `invited` tinyint(1) NOT NULL DEFAULT '0',
  `receive_comment_reminder` tinyint(1) NOT NULL DEFAULT '0',
  `show_admin_only` tinyint(1) NOT NULL DEFAULT '0',
  `user_id` bigint(20) unsigned DEFAULT NULL,
  `comment` varchar(1000) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
  `guests` smallint(6) NOT NULL DEFAULT '0',
  `choice` smallint(6) NOT NULL DEFAULT '-1',
  `temp` tinyint(1) NOT NULL DEFAULT '0',
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT NULL,
  `is_sub_admin` tinyint(1) NOT NULL DEFAULT '0',
  PRIMARY KEY (`id`),
  KEY `participants_user_id_foreign` (`user_id`),
  KEY `participants_poll_id_foreign` (`poll_id`),
  KEY `participants_poll_id_index` (`poll_id`),
  CONSTRAINT `participants_poll_id_foreign` FOREIGN KEY (`poll_id`) REFERENCES `polls` (`id`) ON DELETE CASCADE,
  CONSTRAINT `participants_user_id_foreign` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`) ON DELETE SET NULL
) ENGINE=InnoDB AUTO_INCREMENT=462999 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;