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 ('575786b511f6d44a6adf5d88c1c98e4a', -1, 1635320418, 1635320418, '23af6b4d', -10, 0, 0)

Line : 187
File : sessions.php