How to set default values when importing data so you can leave those fields out of the import.
Select Add.
From the Module field name select the field you want to set a default value for.
In the Default Value fields enter the default text or value.
NOTE: Be sure not to exceed the character limit of the field. For pre-defined lookups, be sure to match the option text exactly. To include a unique index (such as a reference number) use #UNIQUE To include today's date use #TODAY
Save to finish
Your defaults will then be listed.