Parsing GlobalProtect gateway multi user configs failure

[IT.OPS]

I have different purpose (new certificate with different CN) to create a new/parallel portal&gateway (to keep the change transparent for end user/and to keep easy revert back possibilities in worst case), so when i try to create a new por+gw by adding new pub-IP on same internet interface, using new certificate, using new client iP pool range,  i get below error while pushing the policy,

. SSLVPN: Invalid IPv4 pool value: xxxxxxxxxxxxxxxxxxx
. (Module: rasmgr)
. SSLVPN: failed to parse IP pool in tunnel xxxxxxxxxxx
. (Module: rasmgr)
. Parsing GlobalProtect gateway multi user configs failure
. (Module: rasmgr)
. Commit failed

I checked multiple times that there is no overlapping of client subnet that i am using, and subnet value is also perfect, its large enough, tried with /24, /22, but still not sure why its giving above error. 

Is it possible to configure two portal/gateway on same interface but with two different pub IPs and different tunnel interface and different client IP ranges ?