"No accessor to set property @javax.persistence.Id()" when versioning

edit: not sure what happened, but this got unlinked from the original video.

I ran into an issue where I would only get a 500 error response (below).

I couldn't find much information about this after 10 - 20 mins of searching. I did end up, however, finding a solution: I removed the final keyword from the id member declaration in BaseEntity.

I'm assuming this is okay, as it still has private access, and it shouldn't be able to persist a different value because of the @GeneratedValue annotation. Testing with a PUT request returned an updated course object as expected, and the ETag header was updated.

If anyone has any additional insight, I'm interested in learning more about why the id can't be final... maybe it's the version of spring that I'm using (up to date as of this post).

{
    "timestamp": "2019-02-27T03:54:16.376+0000",
    "status": 500,
    "error": "Internal Server Error",
    "message": "No accessor to set property @javax.persistence.Id() @javax.persistence.GeneratedValue(strategy=AUTO, generator=)private final java.lang.Long net.jeremiahshore.core.BaseEntity.id!",
    "path": "/courses/1"
}