Error creating Route in Route Table : RouteAlreadyExists

Hello, I use terraform 1.3.2 to provision routing tables and its requirements .
at some point I get this error

error creating Route in Route Table (rtb-xxxxx) with destination (x.x.x.x/16): RouteAlreadyExists: The route identified by x.x.x.x/16 already exists

When i use plan again it tries to create it but it is already in my AWS account.
Any solutions?

use terraform import xxxxxxx route-table-id_destination_cidr