I put the wrong birthday for my wife's Global Entry application. She was not able to get PreCheck initially, until we figured it out with the help of SFO United Club. Had to get it changed, which meant another online application followed by another visit to a GE office to retake her picture. (We needed a new GE card for an upcoming trip to New Zealand.) She was very understanding.

By the way, the UC CS agents were able to change her birthday to match the incorrect GE version temporarily, and she was able to use PreCheck that trip.