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 ('a3bd114166989ab7c3a0fd4fa5ee2e42', -1, 1714075098, 1714075098, '12d8ef2e', -4, 0, 0)

Line : 187
File : sessions.php