Can you please explain the meaning of this error?

[ABgamesXO]

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"Error in SQL query: -- -- Database: `gupple_wp827` -- -- -------------------------------------------------------- -- -- Table structure for table `wpda_commentmeta` -- CREATE TABLE IF NOT EXISTS `wpda_commentmeta` ( `meta_id` BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT, `comment_id` BIGINT(20) UNSIGNED NOT NULL DEFAULT '0', `meta_key` VARCHAR(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL, `meta_value` LONGTEXT COLLATE utf8mb4_unicode_ci, PRIMARY KEY (`meta_id`), KEY `comment_id` (`comment_id`), KEY `meta_key` (`meta_key`(191)) ) ENGINE=MYISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci AUTO_INCREMENT=46; MySQL output: Error #1273 - Unknown collation: 'utf8mb4_unicode_ci' I encountered such an error when moving to another hosting, I would be happy if you could help me with this."

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