First time install of Marlin

Hi. I am. building a hypercube core xy printer and I am getting an error when installing marlin.. Below is the error and I would appreciated any help, Thanks,

Arduino: 1.8.6 (Mac OS X), Board: "Arduino/Genuino Mega or Mega 2560, ATmega2560 (Mega 2560)"

Conditionals.h:27:2: error: #error "Old configurations? Please delete all #include lines from Configuration.h and Configuration_adv.h."
#error "Old configurations? Please delete all #include lines from Configuration.h and Configuration_adv.h."
^
exit status 1
#error "Old configurations? Please delete all #include lines from Configuration.h and Configuration_adv.h."

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.