SSL issue when using ACME certificate

Hi.

I have found that every time the SSL ACME certificate, from Let's Encrypt, is renewed, all my scripts for automated backup and restore start to fail.

The error message is

certificate validation failed - Certificate fingerprint was not confirmed.

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If I run the command manually I get a prompt for accepting the signature change:

Are you sure you want to continue connecting? (y/n)

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After that, my scripts work again, until the next certificate change.

Is there a way to avoid...

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