I don t know how , maybe i grabbed it by the key to lift it, any suggestion would be appreciated

 

See if you can remove it and compare the mounting mechanism to the next key. It may be that a piece holding it in place broke, maybe around this area (see attached pic). If that's the case you can probably fabricate a replacement.

 

it might be some stem or seed that got in there! good luck man!!

 

Ok,i fixed it, a thread that kept the key down was broken, it only took some super glue