This is ridiculous. Plenty of artists have recorded under multiple names. For the album Mani, he used the name Dorine_Muraille. Unless he re-released the album under the name Gel, there's nothing incorrect about these tags, which are from Spotify in my case, BTW.
Julien Locquet is known by different names. As far as I know he only calls himself Dorine_Muraille on the album "Mani". On the two (highly recommended) albums released on the Japanese Plop label he is called Gel:. To confuse matters further there is rapper that goes by Gel as well. Somehow the two names Locquet goes by have been combined - though perhaps not wisely.