Mysql Tutorial

How to Resolve the WordPress Database Migration Error '#1273 – Unknown collation: 'utf8mb4_unicode_520_ci''?

Linda Hamilton

Dec 20, 2024 am 03:07 AM

How to Resolve the WordPress Database Migration Error

1273 – Unknown Collation: ‘utf8mb4_unicode_520_ci’: A Quandary in WordPress Database Migration

Encountering the enigmatic error message "#1273 – Unknown collation: ‘utf8mb4_unicode_520_ci’", users attempting to migrate their WordPress databases between servers often find themselves perplexed. The root cause of this issue lies in the disparities between MySQL versions deployed on the local and live servers.

To resolve this conundrum, follow these steps meticulously:

Open the SQL file in a text editor: Locate the SQL file that you are attempting to upload to your live server. Using a text editor such as Sublime Text or Atom, open this file.
Perform a comprehensive find and replace operation: Carefully scrutinize the SQL file for instances of "utf8mb4_unicode_520_ci". Replace each occurrence with "utf8mb4_unicode_ci". This modification ensures compatibility with the MySQL version running on the live server.
Save and upload to a fresh MySQL database: After completing the find and replace operation, save the updated SQL file. Establish a brand new MySQL database on your live server. Subsequently, upload the modified SQL file to this newly created database.

By implementing these steps, you can effectively resolve the "Unknown collation: ‘utf8mb4_unicode_520_ci’" error and successfully migrate your WordPress database between servers.

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