“We had to work through a little bit of challenge with moisture intrusion during transport from McGregor to the Kennedy Space Center,” said Steve Stich, the manager of NASA’s Commercial Crew Program.

He added, during a briefing on Aug. 7, that the booster needed to go through the additional testing due to the “water intrusion,” saying it will improve confidence to have SpaceX “get a little shakedown of that booster” with a Starlink mission before it flies the four members of the Crew-9 mission.

Interesting how the mentality towards booster reuse has reversed in the past few years. NASA used to request brand new boosters for crewed missions, and now they prefer flight-proven boosters.