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 ('17f0cd071423f252422b7c7bb5e15f08', -1, 1713866867, 1713866867, '0d3afc08', 1, 0, 0)

Line : 172
File : sessions.php