Duplicates deletion

Roon Core Machine

ROCK in Nuc Intel i5

Networking Gear & Setup Details

Movistart Router

Connected Audio Devices

Usb connected to DAC Weiss 501

Number of Tracks in Library


Description of Issue

When trying to eliminate duplicated in library , if I do in the screen window of duplicates showing only my Hard disk library, what happens is that I lost the original file. The file is not duplicated in the harddisk only in the roon library.
I do not understand why duplicates appears in my local hard drive library