MySQL error 1449: The user specified as a definer does not exist

Why this error happens?

Most of the times, reason is that your database dump through command line or PhpMyAdmin or even other libraries can have SQL’s Definer statements. Now, as per MySQL’s Official Documentation:

The DEFINER clause specifies the MySQL account to be used when checking access privileges at routine execution time for routines that have the SQL SECURITY DEFINER characteristic.

MySQL Reference Manual v8.0

Solution: MySQL mysqldump create a safe backup to ensure no corruption

Use the following command to create backup of your mysql database. Put the command in terminal

mysqldump -hHOST -uUSERNAME -p DATABASE_NAME | sed -e 's/DEFINER[ ]*=[ ]*[^*]*\*/\*/' > BACKUP_NAME.sql

With gzip compression > backup

mysqldump -hHOST -uUSERNAME -p DATABASE_NAME | sed -e 's/DEFINER[ ]*=[ ]*[^*]*\*/\*/' | gzip > BACKUP_NAME.sql