When configuring a cross-project backend service for a load balancer, the backend service refers host project.

[sakai-hayato1]

Question

Question

Hello, I created a load balancer and its url path map in the Host Project and referenced a backend service from the Service Project using a cross-project reference.

I was able to import the existing configuration, but when I tried to add additional configurations and apply them, the backend service was looking for resources in the Host Project instead of the Service Project.
How does the backend service determine which project to reference?

Version info

Terraform: v1.7.0
hashicorp/google: v5.25.0
hashicorp/google-beta: v5.25.0

Error Message

│ Error: Error updating UrlMap "projects/host-project/global/urlMaps/host-project-alb": googleapi: Error 404: The resource 'projects/host-project/global/backendServices/service-project-backend-service' was not found, notFound