Wet dreams

No.
It's infact good.its a sign of recovery.its something that was supposed to be normal.
Q. Is it harmful in rebooting?
A. No. It's not harmful as you may read in practice of sivananda only the watery part of semen is lost during nocturnal emmisions. So it's the body's way of discharging extra semen.
But that doesn't mean it don't harm ...that's why true celibates try to minimise it by sleeping early and waking up early because mostly it happens after 5am.

And you should rather focus on your loss of semen while you are awake not while you are sleeping.

After 2/3 Month it will be even more reduced.