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 ('cc4c93b45d4aa568633cb73d188ce7bc', -1, 1711647923, 1711647923, '03e57cec', -4, 0, 0)

Line : 187
File : sessions.php