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 ('58dc92cf3ff0142f831ce4c1a6ff38cb', -1, 1708471510, 1708471510, '2cc014f0', -1, 0, 0)

Line : 187
File : sessions.php