WordPress database error: [Table 'u758324287_M5XFM'.'wp_amz_cross_sell' was skipped since its definition is being modified by concurrent DDL statement]
SHOW COLUMNS FROM wp_amz_cross_sell LIKE 'is_variable';

WordPress database error: [Duplicate column name 'is_variable']
ALTER TABLE wp_amz_cross_sell ADD COLUMN `is_variable` CHAR(1) NULL DEFAULT 'N';

WordPress database error: [Table 'u758324287_M5XFM'.'wp_amz_queue' was skipped since its definition is being modified by concurrent DDL statement]
SHOW COLUMNS FROM wp_amz_queue LIKE 'nb_tries';

WordPress database error: [Duplicate column name 'nb_tries']
ALTER TABLE wp_amz_queue ADD COLUMN `nb_tries` SMALLINT(1) UNSIGNED NOT NULL;