The v6.0 release of Project Factory is a backwards incompatible release for new projects only, as it changes how the default compute service account is treated when the project is created.
The default of default_service_account changed from "delete" to "disable".
If you want to continue deleting the default compute service account for new
projects, you will need to specify:
default_service_account = "delete"
Projects that are already created with the default not overridden don't need any changes, as their service account is already deleted.
Note that changing default_service_account to "disable" from "delete" on
already created projects will not bring the service account back, as the input
is only applied on project creation.