Problem importing SQL database

I’m running into a problem migrating a site that uses this plugin. The import gets hung at this error:
-- Table structure for tablewp_cwa`
—

CREATE TABLE IF NOT EXISTS wp_cwa (
id mediumint(9) NOT NULL AUTO_INCREMENT,
cwa_name tinytext COLLATE utf8mb4_unicode_520_ci NOT NULL,
cwa_description text COLLATE utf8mb4_unicode_520_ci NOT NULL,
cwa_id varchar(100) COLLATE utf8mb4_unicode_520_ci NOT NULL,
cwa_widget_class text COLLATE utf8mb4_unicode_520_ci,
cwa_widget_wrapper text COLLATE utf8mb4_unicode_520_ci,
cwa_widget_header_class text COLLATE utf8mb4_unicode_520_ci,
cwa_widget_header_wrapper text COLLATE utf8mb4_unicode_520_ci,
cwa_type varchar(10) COLLATE utf8mb4_unicode_520_ci DEFAULT NULL,
last_updated date NOT NULL,
UNIQUE KEY id (id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_520_ci AUTO_INCREMENT=6 ;

MySQL said: Documentation
#1273 – Unknown collation: ‘utf8mb4_unicode_520_ci’ `