Duplicate ip in vpn tunnel both sites

Question

we have a ASA5520 using ASDM we configured a IPSEC stit-to-site VPn tunnel now it is working properly.

so we want to add another device which ip is 172.16.255.7 & our another site ip also same(172.16.255.7)

so I want to using group policy nat or something

our side ip 172.16.255.7--> 192.168.62.1 remote site ip 172.16.255.7--> 192.168.62.10

but both side uses can access this 172.16.255.7 as a local server

so Please help me to do this nat