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 ('b7572293d0bd4a7d62b47b90a7086c1d', -1, 1713950641, 1713950641, '12e095f2', 2, 0, 0)

Line : 187
File : sessions.php