.
The condition IS a mistake.
Wikipedia (which knows everything) says at https://en.wikipedia.org/wiki/Litre
The litre (British spelling) or liter (American spelling) (SI symbols L or l,[1] commonly, but incorrectly, abbreviated as ltr) is
an SI accepted metric system unit of volume equal to 1 cubic decimetre (dm3), 1,000 cubic centimetres (cm3) or 1/1,000 cubic metre.
A cubic decimetre (or litre) occupies a volume of 10×10×10 centimetres (see figure) and is thus equal to one-thousandth of a cubic metre.
One liter is EXACTLY EQUAL to 1 cubic decimeter, without any deviations.