Unexpected warning in PanTro model

[hyanwong]

When e.g. drawing the PanTro BonoboGhost_4K19 model, e.g. via demesdraw.tubes(model.model.to_demes()) I get a couple of demes warnings. These could be worrying to a first-time user (I'm trying to use this in a tutorial example). Is it possible to restructure the model so as to keep an equivalent demographic structure but squash the warnings?

UserWarning: Multiple pulses are defined for the same deme(s) at time 6202.0. The ancestry proportions after this time will thus depend on the order in which the pulses have been specified. To avoid unexpected behaviour, the graph can instead be structured to introduce a new deme at this time with the desired ancestry proportions or to specify concurrent pulses with multiple sources.

python3.12/site-packages/demes/demes.py:1742](http://localhost:53397/Users/yan/Library/jupyterlab-desktop/jlab_server/lib/python3.12/site-packages/demes/demes.py#line=1741):

UserWarning: Multiple pulses are defined for the same deme(s) at time 4003.0. The ancestry proportions after this time will thus depend on the order in which the pulses have been specified. To avoid unexpected behaviour, the graph can instead be structured to introduce a new deme at this time with the desired ancestry proportions or to specify concurrent pulses with multiple sources.

[petrelharp]

Sounds like the second suggestion ("concurrent pulses with multiple sources") may be the way to go?

[hyanwong]

Thanks. That SGTM. I could have a go at changing it, but I suspect it would be far quicker for someone familiar with the demes format or equivalent to change this. Any takers?