Where did I make any claim related to that? The only remark I made was that, "entity X can print money at will" does not imply "entity X has AAA status", as the comment I replied to seemed to imply.
I did not check this, but Zimbabwe definitely did not have an AAA rating in, say, 2008.
You would be correct if they held debts denominated in other currencies, like virtually every other country in the planet.