Wix: How to limit major upgrades to major version numbers?

I need the following behaviour from my wix-based installers:

Every setup in the major version 1.x.x line should majorupdate any previous version of the 1.x.x line.
Every setup in the major version 2.x.x line should majorupdate any previous version of the 2.x.x line but leave the 1.x.x line alone.

I though I could get this to work with the following code, but the setup removed the previous 1.x.x version. Am I mssing something? Is this even possible?

    <Upgrade Id="myguid">
        <UpgradeVersion OnlyDetect="yes" Minimum="2.0.0.1" Property="NEWERVERSIONDETECTED" IncludeMinimum="no" />
        <UpgradeVersion OnlyDetect="no" Maximum="2.0.0.1" Property="OLDERVERSIONBEINGUPGRADED" IncludeMaximum="no" />
    </Upgrade>
    <InstallExecuteSequence>
        <RemoveExistingProducts After="InstallInitialize" />
    </InstallExecuteSequence>

Solution

You need to use a NEW GUID for 2.x if you don't want it to be "aware" of 1.x (i.e. ignore it, don't care, etc)

I use the following code, only changing var.Property_UpgradeCode when I want a new version to ignore previously installed versions (e.g. exist side-by-side in different folders)

<Product Id="*"
         UpgradeCode="$(var.Property_UpgradeCode)"
         Name="!(loc.ApplicationName)"
         Language="!(loc.Property_ProductLanguage)"
         Version="$(var.version)"
         Manufacturer="!(loc.ManufacturerName)" >

<MajorUpgrade AllowSameVersionUpgrades="yes"
          DowngradeErrorMessage="!(loc.LaunchCondition_LaterVersion)"
          MigrateFeatures="no"
          Schedule="afterInstallInitialize" />