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 ('6f4d574aad8ddf19341b0f7a310372a0', -1, 1730416787, 1730416787, '12d92581', 2, 0, 0)

Line : 195
File : sessions.php