Yes, Adam and Eve made a mistake because they listened to the serpent (Genesis 2:4-7) and due to their lack of obedience they were removed from the Garden of Eden (Genesis 2:24). In conclusion, we must learn from Adam & Eve's mishap and pay closer attention to what Jesus Christ tells us in His word, so that our obedience will allow us to "always" eat of the abundance o the land (Isaiah 1:19) ...
Blessings from Breakfast with Jesus,