Not sure why you are getting downvoted. Typo or a copy-paste from another job ad. Its not like IBM team/dept is actually requiring this. I clicked into this

Not sure why you are getting downvoted. Typo or a copy-paste from another job ad. Its not like IBM team/dept is actually requiring this. I clicked into this thinking oh maybe it had a long alpha/beta and IBM is doing something really interesting and needed someone with a deep history.