Wrong error message for update command in some cases

[samriddh2145]

Actual - if the location attribute is left empty and placed after the attendees attribute for the update command, the error message says invalid index. Example - The output after running the command "update -i 1 -n House Party -sd 2024-02-10 -ed 2025-01-02 -a 1 -l " is attached below

Expected - The error message should be correct and display that the location parameter cannot be empty.