Hi all I'm getting following error can someone please help me in resolvinr it

Error
SQL query:

—
— Database: wordpress
—
— ——————————————————–
—
— Table structure for table wp_commentmeta
—
CREATE TABLE IF NOT EXISTS wp_commentmeta (

meta_id BIGINT( 20 ) UNSIGNED NOT NULL ,
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
) ENGINE = INNODB AUTO_INCREMENT =3 DEFAULT CHARSET = utf8mb4 COLLATE = utf8mb4_unicode_ci;

MySQL said: Documentation

#1273 – Unknown collation: ‘utf8mb4_unicode_ci’