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 ('462176e8982e6e3862b1428d9d9388cb', -1, 1713562017, 1713562017, '340ee0c5', 2, 0, 0)

Line : 187
File : sessions.php