Sounds like the tab for the holding windings has come away... are you sure the wire is broken? Normally the wire manages to hold itself when this happens... if its not broken then you can simply glue it back into place as a short term fix... but at the end of day... you need a new coil my friend
Yep as Retropin says, its time for a new coil!!
New coil is not always required.
If the wire has broken away and you are able to unwind it a bit you can just solder it back to the lug, then its good as new.
Losing 1 revolution on the coil winding won't make any difference.
