phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO docttorrdiscluc_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('3fe97dc1198527f6a4d1d8b55832efac', -1, 1544635363, 1544635363, '36e2243c', -11, 0, 0)

Line : 190
File : sessions.php