Ibex was the band Freddie Mercury was in before Queen. Apparently there has only been one bootleg release, in three slightly different editions.
The notes for this one tells some of how the bootleg came to be. https://www.discogs.com/release/21617011-Ibex-Live-At-Sink-Club-1969
Should all three be imported and put together as a release group? The Artist will have to be added. While there are many Ibex in the Musicbrainz database, none of them are this Ibex.