It's a relatively old question and I am sure that @arimaximof17287 has it fixed by now.
Anyhow, what has happened is that the socket has come apart. Looks like the are some clips that may have either come undone, or have broken off. The way I'd fix this would by removing the large nut that holds the lamp socket in place. Then remove the socket and check for the way the clips connect. Either re-attach the clips or replace the lamp socket.
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