Having issues with CP 7 projects converted to CP8, then when saving as I work, it continues to warn that the .cptx file is earlier version and will be converted.

I have CP8, not 8.0.1; what will fix this issue, as it's become annoying? The "conversion" warning appears the first time I open a project file previously saved in CP8, not everytime I save the file, even though the file was converted at a previous time.