Lyrics apearing red

Hello! I have encountered a problem that about half the lyrics I entered for my song is red colored and the other half is black. I noticed that it’s only the black lyrics that is shown in the MIDI editor, like the red colored lyrics isn’t official. I tried to re enter it but it’s still red.

(I entered the lyrics in the score with the “Lyrics from Clipboard” function.)

Why is it red and how can I fix it?