Hi Ahmed Yakout,

Hello,

This problem affects a lot of users frequently.

It occurs when a database entry is made incorrectly or when a programme is upgraded.

Go to your terminal, press Ctrl + C to stop the server process, and then restart it to fix the error.

Your issue will be resolved, and if this error reappears, there may be a database issue. It could possibly have a dependency issue.

Make a fresh database, restart your server, and work on that database.

Thank you.