Pinboard can't be deleted

[A Former User]

A Former User last edited by

Every time I open my pinboards on Opera, I'll see one, that I've deleted a whole lot of weeks ago.
Even if I delete again, it shows up next time. And it's still there on the synchronization page. But every time I click it, a message pops up: pinboard not found!
So how can I delete it from the menu and from the synchronization list at last? Anyone with an idea?