Error: mismatch ipython version (7.29 vs 7.31)

[hhy06]

I'm installing cl-jupyter on Win10 (Microsoft Windows [10.0.18362.1256]) when this error pops up:

C:\tmp\cl-jupyter>python3 install-cl-jupyter.py

cl-Jupyter -- an enhanced interactive Common Lisp shell
(C) 2014-2015 Frederic Peschanski (cf. LICENSE)
----
... Frontend: using IPython v7.31
Error: mismatch ipython version (7.29 vs 7.31)
Abort.

The problem is I don't even have IPython 7.31 ( I checked all files on disk using Everything), so I don't know how the script file chose this IPython in the first place. I do have IPython7.29, and a very old ipython 0.13 from python 2.6. Could there be some residue registry from previous anaconda/python installations that needs to be cleaned up? Or maybe I could specify a frontend manually? Thanks.