How to fix mysql database error?

Question

MySQL

Mistake

I go through root and shows in red:

SELECT `CHARACTER_SET_NAME` AS `Charset`, `DESCRIPTION` AS `Description` FROM `information_schema`.`CHARACTER_SETS`

MySQL said: Documentation

#1449 - The user specified as a definer ('mysql.infoschema'@'localhost') does not exist

Ubuntu system. It seems that for the localhost it is not necessary to create other users if there is root, please help.