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 ('c07b8a4be7d4de38efa2f2c857b23e2f', -1, 1713440374, 1713440374, '1276019e', 5, 0, 0)

Line : 187
File : sessions.php