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 ('fb63d08f3fe4bd5de6a30c652f67f681', -1, 1711693076, 1711693076, '2cdeba94', -4, 0, 0)

Line : 187
File : sessions.php