What does the red plane mean even after upgrading

[vsb2001]

Hi all, can anyone plz tell me why is the plane shown here in pic is indicated in red even after upgrading services?

[randomegyptian]

It just means it still uses airport services

[carlsberg72]

Red = currently using particular service you are clicked on
Yellow= awaiting service to be clicked on to start
Green = all servicing complete ready to depart

[vsb2001]

Thanks,

[vsb2001]

Thanks