phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('b3d4df60ce555c03c6d3a65e7da76b2c', -1, 1560715237, 1560715237, '36912d8f', 3, 0, 0)

Line : 191
File : sessions.php