Track preview doesn't show the waveform

Hi,

I recently imported my tracks using "Sync Manager" from an SSD hard drive to a MacBook computer of mine.  The tracks work fine but the waveform is missing from the preview window and also from the decks when I load them. 

when I view my playlists that are on the SSD drive on the same computer I do see the waveform. It is just unviewable after I import it to the computer's local hard drive itself. 

how can I fix it without analyzing the whole collection again? (130 GB)

I am using RekordBox 6.7.5