NASA’s first all-female spacewalk is on indefinite hold. After Anne McClain and Nick Hague’s successful spacewalk outside the International Space Station on March 22, NASA discovered that they don’t have enough suits of the right size to fit both McClain and Christina Koch, who were scheduled for a spacewalk together on March 29. Earlier this month, the space agency announced it would be the first all-female spacewalk.

The spacewalk will continue, but with Hague and Koch instead. They wil