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) VALUES ('b642c2eba4d240f8fbf919c22b1b5fc1', -1, 1714759963, 1714759963, '1277a3ab', -7, 0)

Line : 158
File : sessions.php