Si haces map.put(“province_id”, “nueva provincia”) se sobrescribe el valor si existe
Put (Key As Object, Value As Object) As Object
Puts a key/value pair in the map, overwriting the previous item with this key (if such exists).
Returns the previous item with this key or null if there was no such item.
Note that if you are using strings as the keys then the keys are case sensitive.
Example:
Map1.Put("Key", "Value"