Title: WordPress database error Last modified: August 5, 2026 --- # WordPress database error * Resolved [almendron](https://wordpress.org/support/users/almendron/) * (@almendron) * [3 days, 9 hours ago](https://wordpress.org/support/topic/wordpress-database-error-210/) * After updating to version 2.4.9, the debug.log file shows hundreds of errors of the same type: * ```wp-block-code [05-Aug-2026 15:35:15 UTC] WordPress database error Duplicate entry '' for key 'wp_blc_links.url_hash' for query ALTER TABLE wp_blc_links ADD UNIQUE KEY url_hash (url_hash) made by require('wp-blog-header.php'), require_once('wp-load.php'), require_once('wp-config.php'), require_once('wp-settings.php'), do_action('init'), WP_Hook->do_action, WP_Hook->apply_filters, blc_init, blcDatabaseUpgrader::upgrade_database, blcDatabaseUpgrader::make_schema_current, blcTableDelta::delta ``` * I’m going to revert to the previous version because the debug.log file is getting far too big. * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fwordpress-database-error-210%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 6 replies - 1 through 6 (of 6 total) * Plugin Support [Imran – WPMU DEV Support](https://wordpress.org/support/users/wpmudev-support9/) * (@wpmudev-support9) * [3 days, 8 hours ago](https://wordpress.org/support/topic/wordpress-database-error-210/#post-18984972) * Hello [@almendron](https://wordpress.org/support/users/almendron/), * I hope things are going well for you. * I can reproduce the same behaviour in the latest version. I appreciate you taking the time to report the issue, which we have forwarded to the BLC team. They will review it soon and share more details. * Please feel free to revert to the recent version from: [https://wordpress.org/plugins/broken-link-checker/advanced/](https://wordpress.org/plugins/broken-link-checker/advanced/). * You can also monitor the change logs; in the upcoming version, we’ll implement a fix for this. While we don’t have an ETA yet, it should be resolved soon. * – Kind Regards, Imran Khan * [Jeff Starr](https://wordpress.org/support/users/specialk/) * (@specialk) * [3 days, 3 hours ago](https://wordpress.org/support/topic/wordpress-database-error-210/#post-18985272) * Hi Imran, any update on when we might expect a fix for this? Thank you. * Plugin Support [Saurabh – WPMU DEV Support](https://wordpress.org/support/users/wpmudev-support7/) * (@wpmudev-support7) * [2 days, 18 hours ago](https://wordpress.org/support/topic/wordpress-database-error-210/#post-18985505) * Hello [@specialk](https://wordpress.org/support/users/specialk/) [@kornelije](https://wordpress.org/support/users/kornelije/), * Thank you for following up. The BLC team is already reviewing the issue; however, at the moment I cannot confirm an exact ETA for when the issue fix will be released. * You can follow the updates on our roadmap here [https://wpmudev.com/roadmap/](https://wpmudev.com/roadmap/) so that you are notified when we release new updates. Apart from that, once the fix is released, it is also going to be described at changelog found at [https://wordpress.org/plugins/broken-link-checker/#developers](https://wordpress.org/plugins/broken-link-checker/#developers) * In the meantime, you can revert to the previous version of the plugin, which doesn’t have the issue [https://wordpress.org/plugins/broken-link-checker/advanced/](https://wordpress.org/plugins/broken-link-checker/advanced/) * Apologies for the inconvenience caused. We’re working on fixing the issue. * Kind Regards, Saurabh * Moderator [Support Moderator](https://wordpress.org/support/users/moderator/) * (@moderator) * [2 days, 15 hours ago](https://wordpress.org/support/topic/wordpress-database-error-210/#post-18985658) * to **whoever has same issue** : please do not post to this topic, unless you are trying to offer a solution. Either – create your own support topic or simply subscribe to this one, using subscription button on the sidebar. * Plugin Support [Williams – WPMU DEV Support](https://wordpress.org/support/users/wpmudevsupport3/) * (@wpmudevsupport3) * [2 days, 9 hours ago](https://wordpress.org/support/topic/wordpress-database-error-210/#post-18986128) * Hi [@almendron](https://wordpress.org/support/users/almendron/) [@specialk](https://wordpress.org/support/users/specialk/), * A new version of the Broken Link Checker has been released with a fix for this issue. This is version 2.4.10. * Could you please update it and let us know if you face further issues? * Best Regards, Williams Valerio * Thread Starter [almendron](https://wordpress.org/support/users/almendron/) * (@almendron) * [10 hours, 25 minutes ago](https://wordpress.org/support/topic/wordpress-database-error-210/#post-18987992) * Problem solved. Thank you Viewing 6 replies - 1 through 6 (of 6 total) You must be [logged in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fwordpress-database-error-210%2F%3Foutput_format%3Dmd&locale=en_US) to reply to this topic. * ![](https://ps.w.org/broken-link-checker/assets/icon-256x256.png?rev=2900468) * [Broken Link Checker](https://wordpress.org/plugins/broken-link-checker/) * [Frequently Asked Questions](https://wordpress.org/plugins/broken-link-checker/#faq) * [Support Threads](https://wordpress.org/support/plugin/broken-link-checker/) * [Active Topics](https://wordpress.org/support/plugin/broken-link-checker/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/broken-link-checker/unresolved/) * [Reviews](https://wordpress.org/support/plugin/broken-link-checker/reviews/) * 6 replies * 9 participants * Last reply from: [almendron](https://wordpress.org/support/users/almendron/) * Last activity: [10 hours, 25 minutes ago](https://wordpress.org/support/topic/wordpress-database-error-210/#post-18987992) * Status: resolved