SYMPTOM:
Consider that a new database instance called "Access DBI" is created in Strategy Desktop 9.3.x. Additionally, this database instance is selected for a project to be a SQL data warehouse, as shown:

Consider that a table from this database instance is added to the project, as shown:

If this database instance is attempted to be deleted from Administration > Configuration Managers > Database Instances in Strategy Desktop 9.3.x, an error message comes up that it cannot be deleted due to a dependent table object as shown:

DB Instance object 'Access DBI' (ID: xxxx) cannot be deleted because Table object 'RUSH_ORDER' (ID: yyyy) in project 'My First Project' (ID: zzzz) depends on it.

On attempting to open Warehouse Catalog for the project which had the table added through the above database instance, the following error subsequently occurs:

Object with ID 'xxxx' and type 29 (DB Instance) is not found in metadata. It may have been deleted.