World reset

Arieni Dena (21 Knight, Peloria) said:
there are many server resets like:

"We had to reset the game world Pyra and Zuna to the state of July 13, 10:00 CEST, due to a technical problem. We would like to offer our sincere apologies for any inconvenience this has caused."

but why? why only 1 or 2 servers need reset due to a technical problem?

how is that even possible?

every month or even less some of the servers need reset and cipsoft apologizes for that

please help me understand why is that and what is that technical problem
13/08/2019 22:22