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 ('d02b23756d3c12b1bc695f21fd4c3658', -1, 1711715430, 1711715430, '03ef60e5', -4, 0, 0)

Line : 187
File : sessions.php