Alveopora tissue die off need help

[Reefer302]

My alveopra that I've had for about 3 months and has been doing great until recently I noticed a patch of dead skeleton in the middle is it doomed? Anybody know what this might be?

 

[blaxsun]

On mine whenever I get a patch like this it's usually because another coral (torch in my case) has stung it. But I don't see anything adjacent with your coral.

 

[Reefer302]

On mine whenever I get a patch like this it's usually because another coral (torch in my case) has stung it. But I don't see anything adjacent with your coral.

Yeah just another alevopra and some gonis although there is a hammer sort of close the sweepers could have touched it