Hey everyone, anyone have an idea why I keep getting my route tables changing?

primary_private_route_table = ec2.RouteTable(
            f'{environment}-primary-private-subnet-route-table',
            vpc_id=vpc.id,
            routes=[
                ec2.RouteTableRouteArgs(
                    cidr_block="0.0.0.0/0",
                    gateway_id=nat_ids['primary_nat_id']
                )
            ],
            tags={
                "Name": f'{environment}-primary-private-subnets-route-table',
                "Environment": f'{environment}'
            }
        )

~ routes: [
          ~ [0]: {
                  ~ cidrBlock   : "0.0.0.0/0" => "0.0.0.0/0"
                  + gatewayId   : "nat-08f9a3f32bfaaa09c"
                  - natGatewayId: "nat-08f9a3f32bfaaa09c"
                }
        ]