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 ('20e72c59630f3bc4506cb9636b945681', -1, 1711720412, 1711720412, '03ec3901', 4, 0, 0)

Line : 187
File : sessions.php