Hello, Akismet plugin in Wordpress started to tell me:

Akismet Error Code: 10402

Your Akismet API key has been suspended. Visit Akismet.com to reactivate your spam filtering subscription.
For more information: https://akismet.com/errors/10402
Subscription Type Personal Free Account
Status Suspended

How can i continue using Akismet plugin for free on Wordpress?