I have struggled to understand the shift, I think the LM curve will shift to the left which is outwards and therefore, the interest rate will increase and production falls.

In the Pride Lands of Africa, production is at the natural level Zazu, Mufasa's most trusted advisor, notices an increase in the price level in the kingdom. If money supply is kept constant, what will happen to production in the short run? (Rises or falls) ANSWER: Falls EXPLANATION: If the money supply is held constant, the real money supply will decrease and the LM curve will shift inwards. The interest rate will increase and production will fall