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 ('c7024a4b83767693fb8c2e30401dfa16', -1, 1713861505, 1713861505, '03912ffd', -4, 0, 0)

Line : 187
File : sessions.php