Resubscribe test blacklisted email

Your software
My Mautic version is: 2.15.3
My PHP version is: 7.2.27

Your problem
My problem is: resubscribe blacklisted test email - how to do?

These errors are showing in the log:

Steps I have tried to fix the problem:
Searched for method to resubscribe a test blacklisted email. .