notice errors: undefined index discounted_value, invalid arg for foreach()
On dmaster just now, on Fees tab for Manage Event, click Add Discount Set for Fee Table, result is errors:
Notice: Undefined index: discounted_value in CRM_Event_Form_ManageEvent_Fee->cleanMoneyFields() (line 813 of /srv/buildkit/build/dmaster/web/sites/all/modules/civicrm/CRM/Event/Form/ManageEvent/Fee.php). Warning: Invalid argument supplied for foreach() in CRM_Event_Form_ManageEvent_Fee->cleanMoneyFields() (line 813 of /srv/buildkit/build/dmaster/web/sites/all/modules/civicrm/CRM/Event/Form/ManageEvent/Fee.php).