Assuming you mean renew your PR card ? Not clear given on other posts you talk about renouncing PR and being a PR never expires, can only be renounced or revoked.
In the Validity section, it says: Validity
Most PR cards are valid for five years, but some are only valid for one year. The expiry date is printed on the card. If your PR card will expire within six months, you should apply to renew your card.