IKEv2 Session Fail - Constraint checking failed

Getting the following error when trying to Setup a VPN Connection between the XG and a different vendor Firewall.

2021-12-01 13:10:25 24[IKE] <XXX-1|6948> authentication of 'X.X.X.X' with pre-shared key successful
2021-12-01 13:10:25 24[CFG] <XXX-1|6948> constraint check failed: identity 'X.X.X.X' required
2021-12-01 13:10:25 24[CFG] <XXX-1|6948> selected peer config XXX-1' inacceptable: constraint checking failed
2021-12-01 13:10:25 24[CFG] <XXX-1|6948> no alternative config found
2021-12-01 13:10:25 24[DMN] <XXX-1|6948> [GARNER-LOGGING] (child_alert) ALERT: peer authentication failed
2021-12-01 13:10:25 24[ENC] <XXX-1|6948> generating INFORMATIONAL request 2 [ N(AUTH_FAILED) ]

Using Pre-Shared Key and have my Local ID and Remote ID type blank.

I have tried Changing to IP address and using that, but did not help.

Any Advice?

Thanks