Wordpress URL issues with ?action=login&mode=register and ?action=login&mode=login

We are having 100s of duplicate URL issues and I don't have any clue as to what should be done. Please note that I am not a techie :(

One out of those 100s of similar examples:

Original URL: https://www.employmentjapan.com/tech-corner/ai-machine-learning-and-deep-learning/a-guide-to-gradient-descent-in-machine-learning/

Duplicate 1:

https://www.employmentjapan.com/tech-corner/ai-machine-learning-and-deep-learning/a-guide-to-gradient-descent-in-machine-learning/?action=login&mode=register

Duplicate 2:

https://www.employmentjapan.com/tech-corner/ai-machine-learning-and-deep-learning/a-guide-to-gradient-descent-in-machine-learning/?action=login&mode=login