The argument "egress.0.to_port" is required, but no definition was found

Terraform CDK for Terraform
1

when runnign cdktf deploy, getting this error:

             │ Error: Missing required argument
             │ 
             │   with aws_security_group.SecurityGroup (SecurityGroup),
             │   on cdk.tf.json line 279, in resource.aws_security_group.SecurityGroup (SecurityGroup):
             │  279:         "egress": [
             │  280:           {
             │  281:             "cidr_blocks": null,
             │  282:             "description": null,
             │  283:             "from_port": null,
             │  284:             "ipv6_cidr_blocks": null,
             │  285:             "prefix_list_ids": null,
             │  286:             "protocol": "-1",
             │  287:             "security_groups": null,
             │  288:             "self": null,
             │  289:             "to_port": null
             │  290:           }
             │  291:         ],
             │ 
 │ The argument "egress.0.from_port" is required, but no definition was found.
             ╵
             ╷
             │ Error: Missing required argument
             │ 
             │   with aws_security_group.SecurityGroup (SecurityGroup),
             │   on cdk.tf.json line 279, in resource.aws_security_group.SecurityGroup (SecurityGroup):
             │  279:         "egress": [
             │  280:           {
             │  281:             "cidr_blocks": null,
             │  282:             "description": null,
             │  283:             "from_port": null,
             │  284:             "ipv6_cidr_blocks": null,
             │  285:             "prefix_list_ids": null,
             │  286:             "protocol": "-1",
             │  287:             "security_groups": null,
             │  288:             "self": null,
             │  289:             "to_port": null
             │  290:           }
             │  291:         ],
             │ 
│ The argument "egress.0.to_port" is required, but no definition was found.

the code (Python 3.9):

sg = aws.security_group.SecurityGroup(self, "SecurityGroup",
                                              vpc_id=vpc.id,
                                              description="Allow internal access and outbound public access",
                                              ingress=[],
                                              egress=[{"protocol": "-1", "from_port": 0, "to_port": 0,
                                                       "cidr_blocks": ["0.0.0.0/0"]}],
                                              tags={"Name": config["vpc"]["sec_grp_name"]})

cdktf --version
0.20.7

terraform -v
Terraform v1.8.5
on darwin_arm64

Any thoughts?