Policy based VPN with overlapping subnets - Need help

Hello All,

How can i configure policy based VPN tunnel with over lapping subnets.

I am using FG firewall at both ends, i have tried to configure Policy based VPN at both ends with different subnets and its up and running. But how can i configure with overlap subnets ? 

Please advice !

Thanks in Advance !!

Naveen.D