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 ('4ee1e5ad153b52ed4370865f2d9567af', -1, 1713856801, 1713856801, '038b5217', -10, 0, 0)

Line : 187
File : sessions.php