Walkman showing duplicate tracks

[Mehal]

I am using Xperia ION LT28h, android Version 4.0.4. For making a back up of my data, I copied songs from Internal storage to External SD card. When I started Walkman App, it was showing multiple music files with same name, so I deleted the songs' folder from internal storage. But it was still showing multiple files, half of them unplayable and I am not able to delete them. Is there any way to delete those unplayable files from the walkman app without connecting to PC??

[Uliwooly]

Settings > apps > all > walkman > clear cache > restart your phone 

[Semite]

I guess not..

Try connecting your device to PC and 'cut' all songs and related folders from Xperia's memory to computer. then rebooted the device, scan the folders on my PC for safety and copy those songs again in Xperia once it restarts..