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NASA has clarified that audio about an injured crew member aboard the International Space Station (ISS), which surfaced on their livestream Wednesday evening, was merely a simulation and not an actual scenario.

The audio, intended to simulate a crew member suffering from decompression sickness, was accidentally broadcast during a routine simulation exercise. In a statement, NASA confirmed the error: “This audio was inadvertently misrouted from an ongoing simulation where crew members and ground teams train for various scenarios in space and is not related to a real emergency. The International Space Station crew members were in their sleep period at the time. All remain healthy and safe.”

SpaceX also addressed the confusion, noting that the audio came from a test conducted in California. “The crew training in Hawthorne is safe and healthy as is the Dragon spacecraft docked to the @space_station.”