Updating to Backstage v1.30.x reports deduplicated issue

[jpd4emis]

Describe the bug
@backstage/backend-app-api has moved again with 1.30.x

The below package(s) have incompatible duplicate installations, likely due to a bad dependency in a plugin.
You can investigate this by running yarn why <package-name>, and report the issue to the plugin maintainers.

@backstage/backend-app-api

yarn why @backstage/backend-app-api
├─ @backstage/backend-defaults@npm:0.4.1
│ └─ @backstage/backend-app-api@npm:0.8.0 (via npm:^0.8.0)
│
└─ @backstage/backend-defaults@npm:0.4.4

To Reproduce
Steps to reproduce the behavior:

1. Update v1.29.2 to v1.30.2

Expected behavior
The update process to not throw any errors.

Additional context
None