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 ('0f692167e0c58016c6b93b21036d7d65', -1, 1714057859, 1714057859, '0390681d', -4, 0, 0)

Line : 187
File : sessions.php