WordPress database error: [Cannot add foreign key constraint]
CREATE TABLE `wp_icwp_wpsf_scanresults` ( id int(11) UNSIGNED NOT NULL AUTO_INCREMENT COMMENT 'Primary ID', scan_ref int(11) UNSIGNED NOT NULL COMMENT 'Foreign Key For Primary ID', resultitem_ref int(11) UNSIGNED NOT NULL COMMENT 'Foreign Key For Primary ID', created_at int(15) UNSIGNED NOT NULL DEFAULT 0 COMMENT 'Created', PRIMARY KEY (id), FOREIGN KEY (scan_ref) REFERENCES wp_icwp_wpsf_scans(id) ON DELETE CASCADE ON UPDATE CASCADE, FOREIGN KEY (resultitem_ref) REFERENCES wp_icwp_wpsf_resultitems(id) ON DELETE CASCADE ON UPDATE CASCADE ) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_520_ci;

WordPress database error: [Cannot add foreign key constraint]
CREATE TABLE `wp_icwp_wpsf_scanresults` ( id int(11) UNSIGNED NOT NULL AUTO_INCREMENT COMMENT 'Primary ID', scan_ref int(11) UNSIGNED NOT NULL COMMENT 'Foreign Key For Primary ID', resultitem_ref int(11) UNSIGNED NOT NULL COMMENT 'Foreign Key For Primary ID', created_at int(15) UNSIGNED NOT NULL DEFAULT 0 COMMENT 'Created', PRIMARY KEY (id), FOREIGN KEY (scan_ref) REFERENCES wp_icwp_wpsf_scans(id) ON DELETE CASCADE ON UPDATE CASCADE, FOREIGN KEY (resultitem_ref) REFERENCES wp_icwp_wpsf_resultitems(id) ON DELETE CASCADE ON UPDATE CASCADE ) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_520_ci;