查了一下官方要求，更新原有护照，似乎只是要求 “不能过期“，或者说 只要是当前有效的护照就可以，还剩多久到期 不是问题。
To renew your Canadian passport, your current passport must
not be damaged
not have been reported lost or stolen
have been issued with a 5-year or 10-year validity
have been issued when you were at least 16 years of age
have the same name, date of birth and place of birth you want on your new passport
have the same gender identifier you want on your new passport (either printed on your current passport or the observation sticker)
have expired on or after February 1, 2019