Is this Jicama bad?

First time cooking with Jicama (thanks AIP for making me try new things) but this doesn’t seem right… is this normal? I’m cutting the brown/ holy parts to throw out, but is this entire jicama actually bad?

First time cooking with Jicama (thanks AIP for making me try new things) but this doesn’t seem right… is this normal? I’m cutting the brown/ holy parts to throw out, but is this entire jicama actually bad?