I bought a brand new CLF L2000 and had the same issue. The dreaded tuner rattle. I tried the superglue and plier repair to no avail. I ended up buying a new one from their on line shop.
I have owned umpteen other manufacturers basses and never had a tuner issue but it seems to be another piece of GL lack of quality control.
I have a machine shop background and I'm not so sure trying to re-crimp the part at home would work unless you have an arbor press. I think the slot was cut too wide and that it needs to be much tighter tolerances since there is a very small clamping area.
I must have played 100 Fender basses and never had this issue. With 2 tributes and 1 US model I had the problem: *with the nearly $2K US JB*. QC is not a strongpoint for G&L. One of my tributes (JB2) had a pup fail as the cavity was much too tight and it was force fit into place.




This will be an instrument with a very clear, very strong character: sunny looks, easy physical demands, but an awesome sound. I wonder who will be the person going, yes, this is exactly what I want ...
... how on earth has it fallen into my lap like this ...?