SchemaError: cannot drop enumerated type - but only altering

[CarsonF]

• EdgeDB Version: 5.8
• EdgeDB CLI Version: 7.1.1
• OS Version:

Steps to Reproduce:

https://github.com/SeedCompany/cord-api-v3/blob/dccebeca2b6065a01f0a9a67b122df347945b954/dbschema/migrations/00015-m15kqz2.edgeql

gel error: SchemaError: cannot drop enumerated type 'default::currentRoles' because other objects in the schema depend on it
  Detail: global 'default::currentUser' depends on default::currentRoles; object type 'default::currentUser' depends on default::currentRoles

[CarsonF]

Here's a minimal repo
https://github.com/CarsonF/gel-drop-global-bug
Trying to create a migration from that produces the error.