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 ('e9799254f45d47374a0450ad3d3e38f4', -1, 1711715155, 1711715155, '03e7de54', -4, 0, 0)

Line : 187
File : sessions.php