Post the SQL statement, not just image of design.
It is not necessary to list table fields in DELETE action because the entire record is deleted.
DELETE FROM table WHERE some criteria here;
Perhaps you should do like:
DELETE FROM dbo_db_AddNewTicket WHERE TicketID IN (SELECT TicketID FROM Temp);
Why would TecnicianID be needed? Can each ticket have more than one technician associated? Don't see how if TicketID is primary key in main table.