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 ('898550ae6108941e660fa4c6d95d7a7d', -1, 1714151639, 1714151639, '039066ef', -4, 0, 0)

Line : 187
File : sessions.php