Acctepting new FTP server Fingerprint through Renci.SshNet code

We recently upgraded an onsite FTP server and D365 process developed to upload a voucher file has stopped working. All login credentials are the same. I believe we need to accept the new Fingerprint to authenticate the server but I am unable to find how to do this through X++ code.

The error is:
enci.SshNet.Common.SshConnectionException: An established connection was aborted by the server. at Renci.SshNet.Session.WaitOnHandle(WaitHandle waitHandle, TimeSpan timeout) at Renci.SshNet.Session.Connect() at Renci.SshNet.BaseClient.Connect() at Dynamics.AX.Application.HSOFtpUpload.`uploadFiles(String _host, String _username, String _password, String _remoteDirectory, String _sourceFile) in xppSource://Source/HSODevelopment\AxClass_HSOFtpUpload.xpp:line 71