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 ('11cf2db2ab1c40c9c3a4db5f72c0cc8c', -1, 1713584647, 1713584647, '0390112d', 2, 0, 0)

Line : 187
File : sessions.php