Can't use nor discard "No.2 Type B Materiel Storage Crate"

[Lethros]

Date & Time: 24th of August, 2023, at approximately 7:25pm (AEST)
Frequency: Once
World name: Tonberry
Character name: Ythelu Ae
Class/Level: White Mage, level 87, leveled up from 86
Party or solo: Party into solo
Area and coordinates: The Copied Factory, coordinates unknown
Steps:
1. Opened loot container at the end of The Copied Factory raid, just as I leveled up from 86 to 87.
2. Needed/greeded/passed on items until I was the only one left in the party, the others left, and I got dumped with the rest of the loot.
3. I now have a "No.2 Type B Materiel Storage Crate" that I can't use, because I already have the items that it gives, and I can't discard it. It won't allow discarding.

[Iscah]

Discard the individual items that came out of the first coffer, then open the second coffer.

You can also put the first set into your glamour dresser, retainer or saddlebag. You just can't have them in your inventory or armoury chest.