Title: Chunk Error Last modified: October 29, 2024 --- # Chunk Error * Resolved [Steven Ray](https://wordpress.org/support/users/steveneray/) * (@steveneray) * [1 year, 7 months ago](https://wordpress.org/support/topic/chunk-error/) * ```wp-block-code Greetings, for last few versions, I consistently encounter a migration error that prohibits the continued use of Duplicator. I have no caches, redirects or firewalls active when creating the archive. I noticed other users have the same failed message when searching Google for same error. I have since deleted the domain where there is no way around this error. From the log...failed processing data replacement: Chunk error, message: Duplicate entry 'https://www.xxxxx.com/' for key 'wp_abj404_spelling_cache.url'[/home/xxxxx/public_html/dup-installer/classes/class.engine.php|461],wait 5 seconds and retry.CHUNK ACTION: CURRENT [search_replace][wp_abj404_spelling_cache][0]CHUNK ACTION: CURRENT [search_replace][wp_abj404_spelling_cache][1]CHUNK ACTION: CURRENT [search_replace][wp_abj404_spelling_cache][2]CHUNK ACTION: CURRENT [search_replace][wp_abj404_spelling_cache][3]CHUNK ACTION: CURRENT [search_replace][wp_abj404_spelling_cache][4]DB QUERY [ERROR][/home/xxxxx/public_html/dup-installer/classes/database/class.db.php:686] MSG: Duplicate entry 'https://www.xxxxx.com/' for key 'wp_abj404_spelling_cache.url'SQL: UPDATE wp_abj404_spelling_cache SET url = "https://www.xxxxx.com/" WHERE id = "67838"TRACE[1] CLASS___: DUPX_DB::mysqli_query FILE: /home/xxxxx/public_html/dup-installer/classes/class.engine.php[644]TRACE[2] CLASS___: DUPX_UpdateEngine::evaluateRow FILE: /home/xxxxx/public_html/dup-installer/classes/class.engine.php[462]TRACE[3] CLASS___: DUPX_UpdateEngine::evaluatePagedRows FILE: /home/xxxxx/public_html/dup-installer/classes/class.engine.php[378]TRACE[4] CLASS___: DUPX_UpdateEngine::evaluateTableRows FILE: /home/xxxxx/public_html/dup-installer/src/Core/Deploy/Chunk/SiteUpdateChunkManager.php[77]TRACE[5] CLASS___: Duplicator\Installer\Core\Deploy\Chunk\SiteUpdateChunkManager->action FILE: /home/xxxxx/public_html/dup-installer/libs/Chunking/ChunkingManager.php[126]TRACE[6] CLASS___: Duplicator\Libs\Chunking\ChunkingManager->start FILE: /home/xxxxx/public_html/dup-installer/ctrls/classes/class.ctrl.s3.funcs.php[118]TRACE[7] CLASS___: DUPX_S3_Funcs->updateWebsite FILE: /home/xxxxx/public_html/dup-installer/ctrls/classes/class.ctrl.ajax.php[233]TRACE[8] CLASS___: DUPX_Ctrl_ajax::actions FILE: /home/xxxxx/public_html/dup-installer/ctrls/classes/class.ctrl.ajax.php[110]TRACE[9] CLASS___: DUPX_Ctrl_ajax::controller FILE: /home/xxxxx/public_html/dup-installer/main.installer.php[47]EXCEPTION ERROR: Chunk error, message: Duplicate entry 'https://www.xxxxx.com/' for key 'wp_abj404_spelling_cache.url'[/home/xxxxx/public_html/dup-installer/classes/class.engine.php|461][CODE:0]FILE:/home/xxxxx/public_html/dup-installer/ctrls/classes/class.ctrl.s3.funcs.php[129]TRACE: 0 /home/xxxxx/public_html/dup-installer/ctrls/classes/class.ctrl.ajax.php(233): DUPX_S3_Funcs->updateWebsite() 1 /home/xxxxx/public_html/dup-installer/ctrls/classes/class.ctrl.ajax.php(110): DUPX_Ctrl_ajax::actions('webupdate') 2 /home/xxxxx/public_html/dup-installer/main.installer.php(47): DUPX_Ctrl_ajax::controller() 3 {main}AJAX ACTION [webupdate] FAIL, MESSAGE: Chunk error, message: Duplicate entry 'https://www.xxxxx.com/' for key 'wp_abj404_spelling_cache.url'[/home/xxxxx/public_html/dup-installer/classes/class.engine.php|461] ``` * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fchunk-error%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 2 replies - 1 through 2 (of 2 total) * Plugin Support [mohammedeisa](https://wordpress.org/support/users/mohammedeisa/) * (@mohammedeisa) * [1 year, 7 months ago](https://wordpress.org/support/topic/chunk-error/#post-18114048) * Hello [@steveneray](https://wordpress.org/support/users/steveneray/), * Thanks for reaching out to us and please accept our apologies for the late reply. We lost this topic somehow. * I understand that you couldn’t restore your backup and you got the error: failed processing data replacement: Chunk error, message: Duplicate entry ‘[https://www.xxxxx.com/’](https://www.xxxxx.com/’); for key ‘wp_abj404_spelling_cache.url'[/home/xxxxx/public_html/dup-installer/ classes/class.engine.php|461], * The error is triggered while the installer was executing this database query: DB QUERY [ERROR][/home/xxxxx/public_html/dup-installer/classes/database/class. db.php:686] MSG: Duplicate entry ‘[https://www.xxxxx.com/’](https://www.xxxxx.com/’); for key ‘wp_abj404_spelling_cache.url’SQL: UPDATE wp_abj404_spelling_cache SET url = “[https://www.xxxxx.com/”](https://www.xxxxx.com/”); WHERE id = “67838” * The reason why this error is triggered is source website database has duplicate entries for the column url in the database table wp_abj404_spelling_cache while the destination database doesn’t accept duplicate entries for the keys of the database tables. * To resolve this error, please go to the source database and remove the duplicates in the URL column in the table wp_abj404_spelling_cache. * You may start by removing the row with the ID=67838 in the database table wp_abj404_spelling_cache. * I hope this helps. * Thanks! * Thread Starter [Steven Ray](https://wordpress.org/support/users/steveneray/) * (@steveneray) * [1 year, 7 months ago](https://wordpress.org/support/topic/chunk-error/#post-18114351) * Thanks, [@mohammedeisa](https://wordpress.org/support/users/mohammedeisa/), for digging through this error for me. I wasn’t trying to restore from a backup, instead I was migrating from one domain to another as outlined.Yes, I was aware that there was a duplication in the database. The error message was clear on that detail.wp_abj404 is related to the **404 Solution** plugin that still doesn’t work well after many updates. It’s removal along with cleaning the database of orphans using **Advanced Database Cleaner PRO** allowed me to achieve the migration without any direct MySQL editing.Thanks! Viewing 2 replies - 1 through 2 (of 2 total) The topic ‘Chunk Error’ is closed to new replies. * ![](https://ps.w.org/duplicator/assets/icon-256x256.png?rev=2906985) * [Duplicator - Backups & Migration Plugin - Cloud Backups, Scheduled Backups, & More](https://wordpress.org/plugins/duplicator/) * [Frequently Asked Questions](https://wordpress.org/plugins/duplicator/#faq) * [Support Threads](https://wordpress.org/support/plugin/duplicator/) * [Active Topics](https://wordpress.org/support/plugin/duplicator/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/duplicator/unresolved/) * [Reviews](https://wordpress.org/support/plugin/duplicator/reviews/) * 2 replies * 2 participants * Last reply from: [Steven Ray](https://wordpress.org/support/users/steveneray/) * Last activity: [1 year, 7 months ago](https://wordpress.org/support/topic/chunk-error/#post-18114351) * Status: resolved