The purpose of signing agreements is also to break them. If an agreement could not be broken, then there's no point in making one.
For those top powers and ultimate beings, their willingness to compromise with Pei Xuanjing stems from the undeniable fact that they need his valuable assistance as well as the recognition of his capabilities.
Yet, while Pei Xuanjing has the strength to stand on equal footing with them, earning him his rightful benefits, what about the others who lack such power?
Therefore, everything is temporary, so is their compromise.
Of course, it's not that they necessarily want to break this agreement. In fact, they absolutely won't, for to blatantly breach the pact would be a dismissal and contempt towards Pei Xuanjing, the ultimate being. Such disdain would trigger his wrath, forcing him into action regardless of his willingness. A situation even those top powers and ultimate beings don't wish to see.
So, what would they do?