Did Theseus kill the Minotaur if Kassandra killed it as well?

In Assassin’s Creed: Odyssey Kassandra fights four monsters from Greek mythology, who guard the artifacts of the Precursor Race. Among them the Minotaur. I am curious, if it is ever explained, how it goes together with the legend of Theseus. He is known to have killed the Minotaur, and he is also mentioned in the game. (You can obtain his armor prior to the fight with the Minotaur, for example.)

Were there originally two Minotaurs, one killed by Theseus and one by Kassandra? Did Theseus lie about killing it? Or is the whole fight just an illusion created by the Piece of Eden, so it is possible to defeat the Minotaur multiple times? (For example that Theseus killed it, but did not collect the Piece of Eden, so the Minotaur "respawned" in the illusory reality after some time?)