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 ('465a4eb3ea24ccd1b3a06b09c177b5bd', -1, 1711662956, 1711662956, '03ebf32d', -7, 0, 0)

Line : 187
File : sessions.php