id is a reserved field name

I'm writing a provider for terraform to interface with an API, here's the resource schema I have:

&schema.Resource{
        Create: resourceProjectCreate,
        Read:   resourceProjectRead,
        Update: resourceProjectUpdate,
        Delete: resourceProjectDelete,
        Importer: &schema.ResourceImporter{
            State: schema.ImportStatePassthrough,
        },

        CustomizeDiff: customdiff.Sequence(
            customdiff.ComputedIf("slug", func(d *schema.ResourceDiff, meta interface{}) bool {
                return d.HasChange("name")
            }),
        ),

        Schema: map[string]*schema.Schema{
            "name": {
                Type:     schema.TypeString,
                Required: true,
                ValidateFunc: validateName,
            },
            "description": {
                Type:     schema.TypeString,
                Optional: true,
            },
            "issueManagementEnabled": {
                Type:     schema.TypeBool,
                Required: true,
            },
            "forkedFromId": {
                Type:     schema.TypeInt,
                Required: false,
            },
        },
    }

There are no compile or install errors with go install, and I'm trying this out locally, so I've set up my .terraformrc to point to my go bin folder.

Terraform seemingly finds an id somewhere, and complains:

Error: Internal validation of the provider failed! This is always a bug
with the provider itself, and not a user issue. Please report
this bug:

1 error occurred:
    * resource onedev_project: id is a reserved field name

The code is here https://github.com/UbiquitousBear/terraform-provider-onedev. Does anyone know where I should be removing the reference to id? It's not in the resource schema.