leapp preupgrade --target command failed with error: argument --target: invalid choice: 'X.X'

Issue

• Planning for in-place upgrade to supported target release as described in Supported in-place upgrade paths for Red Hat Enterprise Linux
  

• Howerver leapp preupgrade --target <Supported Target Release> command failed as below:

  $ leapp preupgrade --target <Supported Target Release>
    ...
    ...
    error: argument --target: invalid choice: 'X.X' (choose from 'X.X')