Thanks..No, you have to contact the province of nomination and request a new one. This is going to be my case.
Note:
Therere are some rules I can't remember, like, either you have to apply or get the updated letter 4 months before your current permit expires or before the letter expires, or simply before. Sorry I can't help much.
I just talked to OINP and ask if we can get support letter again. They said they can provide the letter again. We have to send two recent pay stabs and current work permit to them. But it can be send 3 months before our permit expires.