Unexpected behaviour for param.Selector

Param
1

Hello,
im currently trying out things with param.Selector an experiencing some unexpected behaviour.
With this code

import attr
import param

class B(param.Parameterized):
    ticketview = param.Selector(default=None, allow_None=True, check_on_set=True, objects={"": None, "A": 1, "B": 2})

b = B()
b.ticketview = "B"
print(b.ticketview)

the selector correctly throws an error

ValueError: B not in parameter ticketview's list of possible objects, valid options include [None, 1, 2]

but if i want to change the objects dynamically, the behaviour changes too

import attr
import param

class B(param.Parameterized):
    ticketview = param.Selector(default=None, allow_None=True, check_on_set=True, objects={"": None})

b = B()
b.param.ticketview.objects = {"": None, "A": 1, "B": 2}
b.ticketview = "B"
print(b.ticketview)

This code does not throw any error.

Is there something im not seeing here?
I thought the keys of the dictionary are only for displaying?

EDIT:

Well looking into the init of param.Selector reveals that here

if isinstance(objects, collections_abc.Mapping):
    self.names = objects
    self.objects = list(objects.values())

the objects are rewritten and the names attirbute is used.
Am i expected to mimic this if i want to update the objects of the selector aka

b.param.ticketview.objects = list(new_objects.values())
b.param.ticketview.names = new_objects

or is there a better way?