Create a New Python based KNIME Extension Tutorial - Packages not found

I am trying to follow the tutorial “Create a New Python based KNIME Extension”

When I try to create a conda environment using the suggested command

“conda create -n mypythonenv python=3.11 knime-python-base=5.4 knime-

extension=5.4 -c knime -c conda-forge”

I get the following error:

PackagesNotFoundError: The following packages are not available from current channels:

• knime-

• knime-python-base=5.4

Any suggestions? Thanks