Well I was afking in my world at my gold farm, and my electric went out so I thought  no biggy I'll just go back on and I come back to my world and the one world that I was on is corrupted (look at picture below for what it said) and the last backup I made was earlier that day but in that time I finished my full power beacon, did a storage system for the gold and rotten flesh. I don't know what to do please help me