Useful or not, from you.
lightning How to unstuck payments?

I've managed to get some payments stuck in #3915 . If i run listsendpays, i see a lot of 'pending' payments. How do i fail these? I am unable to send payments or receive payments, as all of my channels already have a lot of active htlcs.

That's a useful answer
Without any help

I still have 7 pending HTLCs, with these timestamps: "created_at": 1596970304, "created_at": 1596970304, "created_at": 1596970305, "created_at": 1596970305, "created_at": 1596970305, "created_at": 1596970305, "created_at": 1596970305,

Shouldn't they have expired by now?