Are You sure?
The rule speaks of a wrong "putting green".
The definition for putting green doesn't mention a temporary green. Is a temporary green without a hole "prepared for putting"?
I cannot find a decision to back up your statement. Have you got one?
I only know golf clubs, which dececlare (by LR) prepared temporary greens, which are not in use as putting greens, as GRU, playing prohibited.
This means, that - other than in rule 25-3 - you wouldn't be allowed to stnd on that green while making your stroke.
I stand to be corrected, because you are known as one of guys with excellent knowledge of the rules in ths forum.