Incorrect error message on add

[manu2002g]

When the add command is run with all the compulsory fields and the idt field, the error message that is thrown corresponds to the last field instead of telling the user that the idt field is invalid.

Eg: find j/engineer p/1244 a/aa e/[email protected] n/name idt/02-02-2022 04:30 produces the error message
"Names should only contain alphanumeric characters and spaces, and it should not be blank"