Can't delete Revision type?

[danbuckinghamCA67E]

I'm tidying up my practice's template, and found a couple of old revision styles that have the delete option greyed out. Why would this be?

[Mike.FORM]

Revit comes with 2 default numberings that cannot be deleted (Alphanumeric & Numeric).

Your 2 DO NOT USE types are likely those which have been renamed.

I would edit them and make them the same as your Preliminary and Construction types and then delete the created ones of those types you currently have.

[danbuckinghamCA67E]

You are correct, they are the OOTB revisions. The issue is we want to use the Numeric numbering system for both Prelim & Construction revisions. My understanding is that the numbering type of these two OOTB types can't be changed, so the Alphanumeric variant will linger forever?

Getting a bit fed up of having to use workarounds for what should be simple functions.

[Mike.FORM]

Alphanumeric uses a custom sequence which can contain anything, including numbers. You can simply type in the sequence you want.

[danbuckinghamCA67E]

I am well aware, but I wish to use the numeric for both, as they are required to behave in the same way.
I don't understand why the ability to remove these has been disabled.
I shall have to continue to leave the DO NOT USE revision types, unless perhaps Dynamo can fix missing Revit features once again...

[Mike.FORM]

It would be nice if Revit was dynamic and allowed the user to delete any numberings they wanted as long as there is at least 1 remaining instead of locking out some.

Or even just letting the user change the types of the defaults.

[danbuckinghamCA67E]

Agreed. I would say I feel an Idea Board brewing, but I'm yet to see Autodesk implement any of the previous suggestions