Can someone explain this Cisco ASA Nat statement

nat (inside,outside) source static obj_10.10.10.10 obj_208.1.1.1 destination static obj_10.20.20.20 obj_10.30.30.30

This statement is on a service provider network that hosts services for multiple clients.

Inside int = 10.10.0.1 Outside int = 45.1.1.1 Service provider public ip address.(.i changed last 3 octets.)

Asa is directly connected to the internet.

The connectivity from customer to service provider is via ipsec site to site vpn.

I believe the customer may have overlapping ip addresses and thats whats at play here.

Any help much appreciated.