Error when updating membership 2

Hello, I had installed Protected Content previously, and now trying to auto update it to Membership 2. I get this error:

Fatal error: Cannot redeclare ms_class_path_overrides() (previously declared in /home/yycpro81/public_html/gosophrosyne.com/wp-content/plugins/protected-content/protected-content.php:99) in /home/yycpro81/public_html/gosophrosyne.com/wp-content/plugins/membership/membership2.php on line 135

Should I delete the old plug in first before updating?