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 ('391e0b507a67ea33e0c9670bc1e96c76', -1, 1714682446, 1714682446, '038b5217', -11, 0, 0)

Line : 187
File : sessions.php