SSH issue while deploying Rails application using Capistrano

I've been trying to deploy the rail application on Digitalocean droplet (ubuntu 22.04) using the following two tutorials
https://www.youtube.com/watch?v=xpYpaRUFzTI&t=945s&ab_channel=Deanin
https://gorails.com/deploy/ubuntu/22.04
But for some reason, I'm getting weird issue deploying using command cap production deploy
This is the error log
SSHKit::Runner::ExecuteError: Exception while executing as deploy@68.183.151.98: fingerprint SHA256:wRhnd217PeR12a4H6z74oca56P3qzBcsTVeiv6IFwjU is unknown for "68.183.151.98"
Caused by:
Net::SSH::HostKeyUnknown: fingerprint SHA256:wRhnd217PeR12a4H6z74oca56P3qzBcsTVeiv6IFwjU is unknown for "68.183.151.98"
Tasks: TOP => rbenv:validatedigitaloceanthe
(See full trace by running task with --trace)
For context, I can able to sign into the server manually using the command ssh deploy@68.183.151.98
ps: been stuck on this for a day now, Is anybody an expert in deploying and has faced similar issue please do help. I've tried ssh-keygen -R 68.183.151.58 on server but its still not working.

update your known hosts

check server ssh keys

double-check deploy user and permissions

check for typos

update gems and capistrano version