Active Pro watches receive software updates just like mobile phones. If you see a request to update the software (mostly will be visible on the screen after night), accept and update it. Accepting updates is required. 

If you do not update the software, the watch may ask you to do so several more times. If you still decline updates and use your watch with an older software version, your watch may not have the latest improvements, or features, or become slower over time.

UAB "Promo vero" bears no responsibility for improper operation of the watch phone if it is used with non-updated software (if there was such an update).