Leveling pacts are handled by the statserver, which is crashing pretty much constantly. They also have some database queries which need to be run in a specific order, but the order is not guaranteed; this is called a "race condition" and results in lots of errors, especially when the servers are as overloaded as they are right now.
So fix we need to figure out why the statserver keeps crashing, then we need to solve the race condition, then we can enable leveling pacts again. It's not intended to be permanent, but I can't give a time estimate because of everything else that's going on.