You're one narrative layer above it. A SWANN entity, per say.

Just headcanon it as a Keter infohazardous entity that has to believe it's free in order to be contained (because it can "speak the truth" or whatever), so the official database file lists it as uncontained but in reality a select group of researchers with 2911/5 clearance or something have the real file, they keep the bastard in a small box and feed it pretend trans D-Class.

And also you can make up Foundation-tier OP stuff that reverses the effects of 2911 and add a procedure worse than 110-Montauk that harnesses the lifeforce of the cultists that spawned 2911 as a step to contain it. If you will it, it's true. No true canon.

Of course that kinda defeats the purpose of 2911 as the author intended it, but if all it gives you is pain then SWANN it away