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

Something is broken:

listpeers  | grep \"htlcs
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []
               "htlcs": []

listpeers  | grep expiry
no output
listsendpays | grep -A 2 -B 9 pending | grep created_at
         "created_at": 1596970304,
         "created_at": 1596970304,
         "created_at": 1596970305,
         "created_at": 1596970305,
         "created_at": 1596970305,
         "created_at": 1596970305,
         "created_at": 1596970305,

They seem to be orphaned.