A critically important computer aboard Hubble has glitched out, causing the space telescope to enter into safe mode.

The 31-year-old Hubble pulled the same stunt this past March, when a software problem caused the telescope to enter into safe mode.

Hubble’s main computer, after failing to receive the usual handshake message from the payload computer, reacted by automatically putting all science instruments into safe mode.

On Monday, a team at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, managed to restart the payload computer, but the problem reappeared.

Once that’s done, all science instruments aboard the spacecraft will be re-started, allowing the telescope—fingers crossed—to resume normal science operations, like imaging galaxies, planets, and other celestial phenomena.

The Hubble Space Telescope, a collaboration between NASA and the European Space Agency, was only supposed to last for 15 years, but here we are over three decades later.