Are you sure Traccar is configured to use MySQL database?
Yes
If you want to see any screenshot for better understanding, I will send you pls let me know
Let's see the config file.
Do you want me to send you the config file?
Send or post it here.
Even we removed all the users or the email id from the frontend (Traccar - Users menu), in the mysql database(remote connection) its not deleting and showing still.