1. Your server needs to be shut down, or all your players needs to be offline.
2. Login to phpMyAdmin.
3. Select players.
4. Select SQL(between Structure and Search), you will see a window where you can write.
5. Delete the text from the window( if there is any), mine always has text "SELECT * FROM `players` WHERE 1", delete it.
6. Paste this code
Code:
UPDATE players SET loss_skills = 0, loss_mana=0;
7. Press Go.
If any player is online, the changes will not affect them. It only affects the offline players.