This article explains how to repair an iPod/iPhone library that has become corrupt. Make sure you have read the following article before you continue reading.
CopyTrans Manager creates automatic backups of your iPod/iPhone library from time to time. CopyTrans Manager can restore those library backups when required. To restore an iPod library backup, please follow these simple steps:
In CopyTrans Manager, go to “More > Settings”
Click on the “Restore” button next to “Restore iPod library from backup”
Select a library to restore (we suggest using the latest backup entries first). Click on “Restore”
CopyTrans Manager will create a backup of the current library, and then restore the library you selected.
If it fails, please read this article.