About the maximum level.

As you know, the maximum hero level is 40. However, I once encountered an interesting situation: on my map, I added experience to a hero up to level 40 using the GiveExp command. The experience was added up to level 40. Dolmens and Silanna trees naturally stopped affecting the hero, but when hovering over the experience bar in the hero's information, the following text appeared: level 40 Experience: 1........./2......... (I don't remember the exact numbers). This indicates that there are levels 41 and possibly even higher levels in the game, they are just blocked. Question: is it possible to create a mod that would make the maximum level not 40, but a higher level?