Trying to add a new parameter

[wass-cloud]

I'm trying to add the parameter ['Typical plated lithium concentration [mol.m-3]'] to my code due to an error I'm getting where it states that this parameter has no value, however when I do

pybamm.ParameterValues.setitem(param, key = 'Typical plated lithium concentration [mol.m-3]', value = 534 / (6.94e-03))

which should use the update() method to create a new item in the dictionary, instead i am getting the following error:

"Cannot update parameter 'Typical plated lithium concentration [mol.m-3]' as it does not have a default value."

From my experience with python this should not occur, it would just add the new key and value to the dictionary, there would be no need for a default value.

[valentinsulzer]

Use parameter_values.update({"Typical plated lithium concentration [mol.m-3]": 534 / (6.94e-03)}, check_already_exists=False)