58 Upgrade notes for 6.0.48

This minor version does not have any upgrade notes.

JavaScript preprocessing: built-in object methods are now read-only

Built-in JavaScript object methods in preprocessing scripts are now read-only. If you have already modified built-in methods on JavaScript prototypes in item preprocessing scripts, you may encounter issues, as modifying built-in prototype methods is no longer allowed.

MySQL database character set and collation

If the Zabbix MySQL database was created with the utf8mb3 character set and utf8mb3_bin collation, it is strongly recommended to convert it to utf8mb4 character set and utf8mb4_bin collation before upgrading Zabbix, as described in Repairing Zabbix database character set and collation.