First off, welcome to the forum! I am not sure where you are getting some of your code from. You seem to be misunderstanding the goal of this challenge.
So, the directions ask you to
"Modify the existing declarations and assignments so their names use camelCase.
Do not create any new variables."
In this challenge camelCase is explained as “In camelCase, multi-word variable names have the first word in lowercase and the first letter of each subsequent word is capitalized.”
Your goal for this is to make sure all variables are camelCase, and the challenge gives you an example of what that looks like
var someVariable;
var anotherVariableName;
var thisVariableNameIsSoLong;
You should not be duplicating the variables, or assigning them to anything. All you need to do is make them camelCase