What does it mean when the SYNC button is flashing?

SYNC synchronizes the BPM and the beat positions, but when the SYNC button is blinking, only BPM is synchronized.
The SYNC button changes from being illuminated to blinking on the basis of the following conditions:
-When pitch bend is used during PLAY on a DECK that is not a MASTER DECK.

You can end the blinking status by using the following steps:
-Press the SYNC button. (SYNC button turns OFF)