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 ('028048b8c1839f7045519c8b01b6352f', -1, 1713885447, 1713885447, '12bc3ddf', -10, 0, 0)

Line : 187
File : sessions.php