Okay...
/etc/letsencrypt/keys/
contains your private keys, and all Let's Encrypt certificates are in public logs. As long as the keys aren't lost, you can download the certificates, fix the files, and put everything back together again.
Going by the timestamps, this key:
is for this certificate:
https://crt.sh/?id=306294887
Let's see...
Go to your home directory or something, then:
mkdir -m 755 siminchikkunarayku.pe
cd siminchikkunarayku.pe
Download the certificate:
curl -o cert1.pem https://crt.sh/?d=306294887
and the intermediate:
curl -o chain1.pem https://letsencrypt.org/certs/lets-encrypt-x3-cross-signed.pem.txt
and create the "fullchain" file:
cat cert1.pem chain1.pem >fullchain1.pem
and copy the private key (as root):
sudo cp -ai /etc/letsencrypt/keys/0094_key-certbot.pem privkey1.pem
You should be able to double check the private key and certificate match like this:
openssl x509 -modulus -noout -in cert1.pem | sha256sum
sudo openssl rsa -modulus -noout -in privkey1.pem | sha256sum
If the hashes are the same, they match.
Make sure the permissions on the other files are reasonable:
chmod 644 cert1.pem chain1.pem fullchain1.pem
Make sure the directory and files are owned by root:
sudo chown root:root cert1.pem chain1.pem fullchain1.pem
cd ..
sudo chown root:root siminchikkunarayku.pe
Move it to /etc/letsencrypt/archive
:
sudo mv -i siminchikkunarayku.pe /etc/letsencrypt/archive/
And fix the symlinks in the /etc/letsencrypt/live
directory:
sudo ln -fs ../../archive/siminchikkunarayku.pe/cert1.pem /etc/letsencrypt/live/siminchikkunarayku.pe/cert.pem
sudo ln -fs ../../archive/siminchikkunarayku.pe/chain1.pem /etc/letsencrypt/live/siminchikkunarayku.pe/chain.pem
sudo ln -fs ../../archive/siminchikkunarayku.pe/fullchain1.pem /etc/letsencrypt/live/siminchikkunarayku.pe/fullchain.pem
sudo ln -fs ../../archive/siminchikkunarayku.pe/privkey1.pem /etc/letsencrypt/live/siminchikkunarayku.pe/privkey.pem
If I got that right, everything should be okay now. And Certbot should renew correctly in about 59 days.