I have figured out a solution to this issue. Go to the terminal and enter the following.

diskutil cs delete “Put Your Logical Volume Group UUID Here”

Ex.8DD219E1-AA47-4F4C-A9DF-72BE79143B43

You can get your UUID from the About This Mac-More Info-System Report-Storage

Make sure to select the proper drive and you want the UUID for the Logical Volume GROUP.

I have figured out a solution to this issue.

Here are the steps:

• Go to Apple menu > About This Mac, click on More Info and then System Report and go to Storage. Get the UUID of the volume from here (an example of a UUID is 8DD219E1-AA47-4F4C-A9DF-72BE79143B43).

• Open Terminal.app and enter the following:

    diskutil cs delete [Put Your Logical Volume Group UUID Here]