From the link at the top:

Although a 20-week ban would be unconstitutional under the viability standard set in Roe, the governor is currently more invested in deciding whether a different ban, which would make abortion illegal after the point in which an embryonic heartbeat could be found, is worth potentially signing into law if it reaches his desk. Today he announced that his office’s preliminary research into the bill says it would be unlikely to survive a court challenge.

There should be a way to sue legislators for malpractice when they spend a bunch of time passing bills they know are unconstitutional.