Maximum number of entries has been reached - IPs per interface

I see now that there is a limitation of 32 secondary IPs per interface on the 90d, this seems very low.

Im on the process of using a 90D (straight routing, no NAT) as an intermediary router to a Linux based management router we have. Long story short this management router has 190 some IPs on its internal interface ranging from /30 to /24 in size that act as gateways for various networks. I cant split the gateways between different interfaces connected to a switch because we use DHCP relay and doing so would cause it to fail.

I have an Imagestream Router sitting next to me I can move this to, but would prefer the Fortigate for its visibility. (this is just routing between two interfaces, no sec profiles, not control, policy is allow all, no NAT)

Is there a way around this arbitrary limit of 32 IPs?