Question

ERROR 1273 (HY000) at line 25: Unknown collation: 'utf8mb4_unicode_520_ci''

Posted on March 25, 2017
CMS Ubuntu
Asked by avinashhrms

Hi All,

This is first time I am trying to migrate my website from shared hosting to Digital Ocean. I was following this guide for the same.

But when i run this command mysql -h localhost -u database_user -p database_name < backup_db.sql to restore database I am getting below error.

**ERROR 1273 (HY000) at line 25: Unknown collation: ‘utf8mb4_unicode_520_ci’ **

I have selected ubuntu 14.04 and Ngnix

Could you please help

Thanks, Avinash

Submit an answer

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!

These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.

Flamber Hansen • March 25, 2017

Accepted Answer

@avinashhrms I’m pretty sure you’re seeing this error because you’re actually downgrading database.

I would highly recommend you setup 16.04 for WordPress, since it comes with a much newer Nginx, PHP and MySQL, which is also twice as fast.

So either use a newer setup (with MySQL 5.5.3+), or edit your backup_db.sql and do a search/replace of utf8mb4 to utf8 If you export the data via phpMyAdmin, you can change the compatibility mode to MySQL4. That would also solve it.