It's important to realize that once an object or property is "locked" (e.g. prevent extensibility on an object - most likely by being sealed or frozen) it canno

It's important to realize that once an object or property is "locked" (e.g. prevent extensibility on an object - most likely by being sealed or frozen) it cannot be "unlocked" - it's that way for as long as the object exists. This is done intentionally in order to prevent other code from unlocking it and then modifying it.