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 ('9e6816db0c7edd7c7c3826bf26b90636', -1, 1713968497, 1713968497, '03854f46', -8, 0, 0)

Line : 187
File : sessions.php