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 ('8c4154348de3403d03db56ed85c67950', -1, 1711632992, 1711632992, '23ab9f8d', -4, 0, 0)

Line : 187
File : sessions.php