Tracks keep green when i start a new session / las canciones se quedan en verde

Hey,

Last 2-3 times i have opeened rekordbox, the songs i played in last session kept on green, as if I played them on this current session. Then i played again and now new songs i played added to those green songs. So now everytime i open it all the songs i have played lately are on green. This happened after 2 updates before I think. I tried to look for the solution but i can't do this, i even deleted the history of the last sessions but they are still on green.

Thanks

In spanish:

Hola, cada vez que abro rekordbox las canciones que he usado en sesiones anteriores se me quedan marcadas en verde como si las hubiese puesto en la sesión actual. Cada vez que hago una sesión se van sumando al verde las nuevas canciones y no tengo forma de que vuelvan a ponerse blancas. He probado a borrar el historial de las  sesiones anteriores pero nada. Alguna solución? Gracias