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 ('c20a2a9eb8d87a21b9310502f3b56c02', -1, 1714038704, 1714038704, '0d3ac51a', -4, 0, 0)

Line : 187
File : sessions.php