The same is true for other schema as well
This might be an artifact of us not allowing you to persist references to schema that don’t exist (at the time of creation anyway).
Some schema, for example Roles, require you to specify existing schema references in your Role definitions: like if you try to add permissions for a Collection that doesn’t exist, you’ll get an error.
Are you able to work around it? Here’s an older post where I do a similar upsert-function query: "Upsert" FQL example not working - #4 by ptpaterson