Replacing a Mobile file

Hi,
I've had to replace my Mobile file (don't ask!) and I'm trying to get it to 'Zync - Prep and Upload New File'.
A 'Build Number' error appears stating that the build number cannot be incremented. It recommends that I add the GZ table to my mobile file but I've already done that.
Is there a simple fix to this, maybe reset the build number or something?
Thanks
Brian.
I've had to replace my Mobile file (don't ask!) and I'm trying to get it to 'Zync - Prep and Upload New File'.
A 'Build Number' error appears stating that the build number cannot be incremented. It recommends that I add the GZ table to my mobile file but I've already done that.
Is there a simple fix to this, maybe reset the build number or something?
Thanks
Brian.