Unexpected Runtime Error

Something went wrong: Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

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The items are visible...

https://item.mania.exchange/item/view/69161

But when I click on the "SET" link it'gives the error above.

Post Edit::

I get the Same error when i click on my user link

https://item.mania.exchange/user/profile/15539

2nd Post edit.

Issue has been resolved. NO more error messages.

Best regards,

Shrike.