Contradiction with Deuteronomy 1:39
This verse suggests the same idea, not a contradiction.
Deuteronomy 1:39: Moreover your little ones, which ye said should be a prey, and your children, which in that day had no knowledge between good and evil, they shall go in thither, and unto them will I give it, and they shall possess it.
Paradox #1
Numbers 14:31 might present a contradiction in the sense that it involves the punishment of an entire generation, except for their children, for the unbelief and actions of their parents. This could seem inconsistent with the idea of individual responsibility and justice, where people are held accountable for their own actions rather than suffering consequences due to the behavior of others.