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 ('d8503c57b1283a6561d03072e9a97279', -1, 1635185571, 1635185571, '23acd9ae', -4, 0, 0)

Line : 187
File : sessions.php