Removing part of album name from the end of the field

I have some files with the %ALBUM% field formatted like this.

[Catalogue Number] Album Title [Catalogue Number]

I’d like to remove the second instance of the catalogue number from the end of the album title.

I’ve not been able to get my head around a regular expression that would allow me to do so.

Can anybody advise?

Thanks

Try Convert>Tag-Tag for ALBUM
Format string: $regexp(%album%,'(.*)\s+\[.*',$1)

So, which program does not read the tag field for ALBUM?
Or are you talking about the filename?
Then use Convert>Tag-Filename afterwards to write a new filename.

Don’t worry, I realised I had entered it in the wrong place. It now works as it should! Many thanks