Free item not set in the pricing rule

Pricing rule ItemBuy2Get1 was created with “Apply On = Item” “Price Or Product Discount = Product” “Product = ZTEST001” “Min Qty = 2” and “Same Item = X” and “Qty = 1”. When added in the invoice with “Qty = 3” getting the error ’ Free item not set in the pricing rule ItemBuy2Get1’

Am I missing something in the configuration

Regards,
ArunG