Pv6 Prefix Length: 0
PDN Address and Prefix(IPv6): 0000000000000000000000000
PDN Address and Prefix(IPv4): 0.0.0.0 (0.0.0.0)
The IPv6 Prefix length is 0... and this is not accepted by the Security Gateway. But the issue is that if gateway is not enabled for the IPv6 traffic, the IPv6 Prefix length 0 (zero) is not an error.