First, stop the service:
EVE-NG relies on a local MySQL database to store everything: user credentials, lab topologies, node configurations, and permission settings. When the EVE-NG GUI (the web interface) cannot talk to the database backend, it throws this error. Database Error 90003 Eve-ng
systemctl status mysql If it shows active (running) , go back to your web browser, clear your cache, and refresh. If the error is gone—congratulations, you’re done. If MySQL fails to start or restarting didn't fix the GUI, the database tables are likely corrupted. First, stop the service: EVE-NG relies on a
mysql -u root eve_ng_prod Once inside the MySQL prompt ( mysql> ), run the repair command: If the error is gone—congratulations, you’re done
If nothing else works:
repair table auth_behavior; repair table labs; repair table nodes; repair table users; exit; Finally, kill the safe mode process and restart normally:
systemctl stop mysql Now, run the MySQL safe recovery mode to force a repair of the EVE database: