SpaceX grounds its Falcon 9 rocket after a problem with its upper stage. Will the Crew-12 astronaut mission be affected?

SpaceX has temporarily grounded its workhorse Falcon 9 rocket, which is slated to launch four astronauts just eight days from now. A Falcon 9 delivered 25 of SpaceX's Starlink satellites into low Earth orbit (LEO) as planned on Monday (Feb. 2). But, after deploying the payloads, the rocket's upper stage failed to perform its deorbit burn, which was designed to bring it down for controlled destruction in Earth's atmosphere. More

(Source: Space.com - Feb 4)