Temporal inversion

From Memory Alpha, the free Star Trek reference.

A temporal inversion is a type of major temporal incursion. A temporal inversion in the Takara sector was one of three major time travel incidents attributed to the USS Voyager, that Captain Braxton had to repair. (VOY: "Relativity")

This refers to the USS Voyager's aborted quantum slipstream flight in 2375, which in an alternate timeline resulted in the ship's destruction in the Takara sector. Years later, Harry Kim and Chakotay, the only survivors, sent a message into the past to avert the disaster. (VOY: "Timeless")