How Many Killed At Acacia Grove – 23,000 or 24,000?

Skeptics and Bible critics have claimed the Bible contradicts itself about how many fornicating Israelites were killed by the plague at Acacia Grove, ( Shittim in Hebrew). One account says 24,000 and another account says 23,000, making the Bible unreliable, they claim. How many were killed at Acacia Grove?
ALLEGED CONTRADICTION:
“When the Israelites dwelt in Shittim they committed adultery with the daughters of Moab. God struck
them with a plague. How many people died in that plague?
(a) Twenty-four thousand (Numbers 25:1 and 9)
(b) Twenty-three thousand (I Corinthians 10:8)”