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 ('3cc1c8a5e2f3e1cb4dea043c119f4e0f', -1, 1711727385, 1711727385, '2cde5a19', -7, 0, 0)

Line : 187
File : sessions.php