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 ('c78bae25c0de3b60eb92304a5db57ac4', -1, 1714035856, 1714035856, '12df6b95', -9, 0, 0)

Line : 187
File : sessions.php