A closer look helps.
Focused explanations for two easy-to-confuse problems. Start with the observation before assuming the repair.

When a Key Fob Button Sticks
A button that stays pressed is a physical observation. It does not, by itself, establish a programming fault or the need for a complete replacement.

When the Key Will Not Leave the Ignition
A key that will not come out after parking is a different complaint from one that will not turn or start the vehicle.