Hi Win,
As they are mandatory fields, you cannot leave them empty.
The workaround is to connect to DB and remove them.
1. Connect to DB. Steps available in link below
2. Execute the below query
select * from networkproxydetails
3. If this above query fetches the right details, then go ahead
with delete operation.
delete from networkproxydetails
Whenever a delete query is involved, I recommend my users to
backup before executing it. Steps to backup is available in this
link
By the way, is there any specific reason for removing these
entries. I am trying to understand the scenario and see how this could
be improved in future.
Ramesh