Maranatha - The Meaning and Message

In first Corinthians 16, Paul writes:

“If anyone has no love for the Lord, let him be accursed. Our Lord, come!” (1 Cor 16:22)

“Our Lord, Come” is pronounced from the original text as Maranatha.

But this isn’t the usual Greek phrase used in Revelation 22:20 “Come, Lord Jesus!.”