Error while saving the interface

Foreman and Proxy versions: 1.23.0

I get the the below error while saving the host configuration after adding the subnet details as in the pic

Error: Unable to save * Create DHCP Settings for staging.example.com task failed with the following error: ERF12-6899 [ProxyAPI::ProxyException]: Unable to set DHCP entry ([RestClient::BadRequest]: 400 Bad Request) for proxy https://staging.example.com

:8443/dhcp

Please advice.

Thanks

Looks like there was an error on the proxy side - could you attach the relevant part of the proxy log?