import pybamm

parameter_values = pybamm.ParameterValues("Chen2020")

# Dummy a pybamm.ParameterValues object with a legacy parameter name
parameter_values.update(
    {
        "Negative electrode diffusivity [m2.s-1]": parameter_values["Negative particle diffusivity [m2.s-1]"],
    },
    check_already_exists=False,
)
del parameter_values["Negative particle diffusivity [m2.s-1]"]

# Try to run a simulation with the old-style parameter set
model = pybamm.lithium_ion.DFN()
experiment = pybamm.Experiment(
    [
        "Discharge at 1C until 3 V",
    ]
)
sim = pybamm.Simulation(
    model,
    parameter_values=parameter_values,
    experiment=experiment,
)

# KeyError provoked here on call into pybamm.ParameterValues with new key name
sol = sim.solve()