What does it mean to refresh your resume and show that the keys can't match?

This sentence usually means that the recovery key (also called recovery password or recovery ID) does not match the recovery key bound under the current account.

In Zhaopin recruitment, each user has a unique resume key to protect his resume from being viewed or modified by unauthorized persons. When creating a resume in Zhaopin, a random resume key will be generated and bound to the account. You need to keep this key and use it every time you log in.