Tree of Savior Forum

Did I missed some kind of weapon update or something? My weapon lost the upgrade

I’m kind of inactive player and only logged in to do the daily event and log off for the day. My newest class is a Cleric (below 170) with Wiz as a main.
I transferred a +7 Catacomb Club (req lv170) from my Wiz to my Cleric via shared storage months ago and left if there because I cannot use it yet and today I used the Special Anvil that does not consume silver (event reward a couple days ago) to gamble my Catacomb to +8 but after the success I saw my weapon as +2 only.

BTW I did not check the club upgrade level before the upgrade because I know it’s +7 not +1 and I this is the second time I attempted a +8 with Superior Corona as first and if my memory serves me right My S. Corona went down to +6 not +0 or anything.

Did I missed something? Like is this a effect of the special anvil or was there a weapon update?