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 ('c724b2c2f799c1be1dfff913cc4e2257', -1, 1714622763, 1714622763, '12df7cf4', 1, 0, 0)

Line : 187
File : sessions.php