I want to import membership in update mode and I don't have start_date
so at the time of import it shows me start_date
is required field. I have removed membership_start_date
required field from /civicrm/CRM/Member/Import/Form/MapField.php
file after that it is giving me error-
Invalid value for field(s) : Membership Start Date is required to create a memberships.; Start Date" in import_error.csv file