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 ('d2616bae5a7d9d470d05a0f3e503a151', -1, 1714600256, 1714600256, '0d3a89da', 0, 0, 0)

Line : 187
File : sessions.php