extract parts of title

I accidently made a mistake with a large amount of mp3's. They all have the same format now in filename, title and artist. How can I split them into separate names again.

Current situation:
e.g.
Filename = 1 - Queen - Bohemian Rhapsody.mp3
Title = 1 - Queen - Bohemian Rhapsody.mp3
Artist = 1 - Queen - Bohemian Rhapsody.mp3

Desired situation:
Filename = 1 - Queen - Bohemian Rhapsody.mp3
Ttle = Bohemian Rhapsody.mp3
Artist = Queen

Thanks in advance for your reactions and help!

Define an action:

Type: Guess Values
Source format: %_filename%
Guessing pattern: %track% - %artist% - %title%

or use the Convert Menu "Filename - Tag" with the same guessing pattern.
There you can preview the result and so it is very easy to learn how this works.

How easy a solution sometimes is :unsure:

Thanks!!!