Custom Power plan- can't create from EXISTING customized plan

windows 11, 24H2. (doesnt matter, same with prior versions)
i hvae the default power plans.

I created a NEW CUSTOM PLAN - aa-Custom-01. I modified many items in it

I want to create a NEW custom plan - aa-Custom-02. I want to use aa-Custom-01 as the starting point.

BUT, if you go to CREATE PLAN, it then offers to let you select a CURRENT plan as starting point, but it only lets yo use teh DEFAULT PLAN NAMES, it does not let you use your already-created CUSTOM plans as a starting point.

HOW to create a new power plan, using one of my CUSTOM plans as a starting point?

powercfg /duplicatescheme, which clones an existing power plan will only accept GUID identifiers and not a scheme name.

1 Run "powercfg /list" to list your current plans by their GUID's.

2. Run "powercfg /duplicatescheme [xxxxxxx]" where [xxxxxxx] is the existing plan's GUID you want to copy. Windows will create a random GUID for the copy. You can specify a non-overlapping GUID, but it's easier to have Windows pick a new GUID.

3. Run "powercfg /list" or look at the new [yyyyyyy] GUID created after copying.

4. Rename the new plan:

thanks ! I'll give it a try !