MySQL 8.0

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CREATE TABLE mytable(
   pk     integer auto_increment primary key,
   ID     INTEGER  NOT NULL 
  ,Date   datetime NOT NULL
  ,Status VARCHAR(12) NOT NULL
);
INSERT INTO mytable(ID,Date,Status) VALUES (1,'2020-11-02 15:00','New');
INSERT INTO mytable(ID,Date,Status) VALUES (1,'2020-11-02 15:00','New_Step');
INSERT INTO mytable(ID,Date,Status) VALUES (1,'2020-11-02 15:05','Start');
INSERT INTO mytable(ID,Date,Status) VALUES (1,'2020-11-02 15:05','Stop');
INSERT INTO mytable(ID,Date,Status) VALUES (1,'2020-11-02 15:10','Start');
INSERT INTO mytable(ID,Date,Status) VALUES (1,'2020-11-02 15:15','Transferred');
INSERT INTO mytable(ID,Date,Status) VALUES (1,'2020-11-02 15:20','Stop');
INSERT INTO mytable(ID,Date,Status) VALUES (1,'2020-11-02 16:25','End');
INSERT INTO mytable(ID,Date,Status) VALUES (2,'2020-11-02 16:00','New');
INSERT INTO mytable(ID,Date,Status) VALUES (2,'2020-11-02 16:00','Start');
INSERT INTO mytable(ID,Date,Status) VALUES (2,'2020-11-02 16:05','Stop');
INSERT INTO mytable(ID,Date,Status) VALUES (2,'2020-11-02 16:10','Start');
INSERT INTO mytable(ID,Date,Status) VALUES (2,'2020-11-02 16:15','Stop');
INSERT INTO mytable(ID,Date,Status) VALUES (2,'2020-11-02 16:20','Start');
INSERT INTO mytable(ID,Date,Status) VALUES (2,'2020-11-02 16:25','New_Step');
INSERT INTO mytable(ID,Date,Status) VALUES (3,'2020-11-02 16:30','Transferred');
INSERT INTO mytable(ID,Date,Status) VALUES (2,'2020-11-02 16:35','End');

id	sumtime
1	15
2	25
3	null