"OK to recall and resume previous memory?" message appears on the LCD. What does it mean?

This message is displayed when the machine is turned off, then on again before embroidering is completed.
Touch [OK] to resume embroidering.
If the embroidering screen was displayed before the machine was turned off, back up several stitches, and then continue embroidering.

FAQ et Diagnostic

"OK to recall and resume previous memory?" message appears on the LCD. What does it mean?