You cannot use this reference target as too much time has elapsed since it was printed.
Cause
As ink dries, it changes color slightly. Even though the human eye cannot detect these changes, the spectrophotometer can. This change of color can contaminate the calibration data that the proofer uses to maintain color consistency.
Therefore, in order to calibrate your proofer, you must measure the printed target within a specified period of time. The wizard automatically keeps track of the elapsed time for you.
Solution
Cancel the wizard and start the calibration process again.
This will print another Reference Target and restart the timer. The wizard will guide you through the remaining steps.