adding a note to the python readme regarding uninstalling conflicting…

… cuda-quantum packages

Signed-off-by: Bettina Heim <[email protected]>

python/README.md.in

@@ -36,7 +36,14 @@ ${{ package_name }}`. Please make sure your `pip` version is >= 24.0.
 If you have an NVIDIA GPU on your host system, you will be
 able to use it without any further installation steps.
 
-However, if you want to perform multi-GPU simulations, or if you are using
+.. note::
+
+  Please check if you have an existing installation of the `cuda-quantum`, 
+  `cudaq-quantum-cu11`, or `cuda-quantum-cu12` package, 
+  and uninstall it prior to installation. Different CUDA-Q binary distributions 
+  may conflict with each other causing issues.
+
+If you want to perform multi-GPU simulations, or if you are using
 `aarch64`/`arm64` processors, additional components must be installed. We
 recommend using [Conda](https://docs.conda.io/en/latest/) to do so. If you are
 not already using Conda, you can install a minimal version following the