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 ('34fc0ac6de3e8e1b4359f9c6bd7e3d1d', -1, 1714372104, 1714372104, '0a020003', -7, 0, 0)

Line : 187
File : sessions.php