Problem with wp_tutor_order_itemmeta

When turning on the WordPress debugger, I get this:

Erro no banco de dados do WordPress: [Failed to open the referenced table ‘wp_tutor_order_items’]
CREATE TABLE wp_tutor_order_itemmeta ( id BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT, item_id BIGINT(20) UNSIGNED NOT NULL, meta_key VARCHAR(255) NOT NULL, meta_value LONGTEXT NOT NULL, PRIMARY KEY (id), KEY item_id (item_id), KEY meta_key (meta_key), CONSTRAINT fk_tutor_itemmeta FOREIGN KEY (item_id) REFERENCES wp_tutor_order_items(id) ON DELETE CASCADE ) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_520_ci

This seems problematic. How to resolve?