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 ('1b0310eefc34d571d1eb2698ab32e275', -1, 1638208773, 1638208773, '36eabfca', 38, 0, 0)

Line : 187
File : sessions.php