Serato DJ Pro has detected some corruption in the file. It is possible this file may not play correctly, and/or make your library unstable. If possible, re-encode the MP3 or remove from the library.
SEE CORRUPT FILE DIAGNOSES FOR MORE INFORMATION

The track cannot be found and will appear yellow in the library. Most likely the file has been renamed or moved location since it was first used in Serato DJ Pro. 
SEE RELOCATE LOST FILES FOR MORE INFORMATION

The track has been imported from the iTunes Library. 
SEE SHOWING YOUR ITUNES LIBRARY

The track has been imported from iTunes but is corrupt.

Serato DJ Pro is trying to import a track from the iTunes library, but cannot find the file

The track is locked. 
SEE LOCK TRACKS FOR MORE INFORMATION

The track's Beatgrid and BPM is locked. 
SEE LOCK BEATGRIDS FOR MORE INFORMATION

The Track is a Whitelabel Audio File. 
SEE WHITELABEL AUDIO FILES FOR MORE INFORMATION

The Track is a locked Whitelable Audio File. 
SEE LOCKED WHITELABEL AUDIO FILES FOR MORE INFORMATION

The track is a video file.
SEE SERATO VIDEO FOR MORE INFORMATION

The track is a Karaoke file.
SEE KARAOKE FOR MORE INFORMATION

The track has a Prepared Stem associated with it, and has been moved to the Stems crate.
SEE PREPARING TRACKS FOR USE WITH STEMS FOR MORE INFORMATION