* The group is question (DOGE) is tasked with cutting spending deemed superfluous or wasteful.
* The group in question is actively cutting spending at the agency in question (CISA)
* The group in question is actively cutting spending with the vendor in question (MITRE)
* The leader of the group in question (Elon Musk) has said, more or less explicitly, that they have a bias more towards cutting spending and less towards getting the spending cuts right. They expect mistakes to be made. (If you want to dispute or nitpick this, I'll link you to the video where he laughs about cutting ebola prevention funding.)
* The boss of the group in question (Trump) really doesn't like CISA. See: the Chris Krebs debacle.
So, that's what I'm doing. What are you doing? It seems to me that you are trying to fit the available facts to your preferred narrative, instead of the other way around. And what does the contract having existed for 25 years have to do with anything? DOGE has admitted to cutting programs that have been funded for far longer. It is completely irrelevant.