I want my delirium entrance back

Hi, i've experienced a server downgrade or issue in BR Today 23-01-2025 and lost a delirium entrance which i perform a lot of farming to attain it. It seems to me that is hugely unfair to lost the entrance when i was reaching the 5/15 stage of the delirium boss. I think that you could find the registry or log of the players to see that i'm telling the truth.
Thanks in advance.