Actually they would have a reason to fight over it
It's the same reason the major conflict in Star Wars occurred, galactic supremacy. If Naboo was just discovered, why would they just let it go? The Repubic and Empire would both want territory on the new found planet. This would lead them both to Naboo, in search of land to sharpie their name on every planet in the galaxy, like they always do. At this point in time, the Gungans were not unified, they lived in tribes, constantly at war with each other. To make allies across the galaxy (like always) , the Republic and Empire could ally with a Gungan Tribe that suits them, done. New planet concept, missions, PvP, PvE, everything, right there.