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 ('7dc1b2c7edf376e9f16eeaf4cae4fa3d', -1, 1714027428, 1714027428, '0387b9c2', -4, 0, 0)

Line : 187
File : sessions.php