If you're working with MySQL and you encounter the error message "Error 1273 Unknown Collation utf8mb4_0900_ai_ci", it can be frustrating and confusing. This error message typically indicates that your database is running on a version of MySQL that doesn't support the collation you're using. The collation utf8mb4_0900_ai_ci was introduced in MySQL version 8.0.1, so if you're using an earlier version of MySQL, you may encounter this error message. To resolve this issue, you have a few options: Upgrade to a newer version of MySQL: If you're not already using MySQL 8.0.1 or later, upgrading to a newer version should resolve the issue. Make sure to backup your database before upgrading. Change the collation: If upgrading to a newer version of MySQL isn't an option, you can try changing the collation to one that's supported by your version of MySQL. For example, changing the collation to utf8mb4_unicode_ci should work with earlier versions of MySQL. Mo...
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