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 ('93db78724ce4f8a9ea895c848bcfba4d', -1, 1574410582, 1574410582, '12cc3868', -1, 0, 0)

Line : 190
File : sessions.php