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 ('9a0be5a0306ce50393f46427c98bcfef', -1, 1781018650, 1781018650, 'd849d8e6', 9, 0, 0)

Line : 189
File : sessions.php