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 ('9c49ba49717d0e0e230f734618f10b86', -1, 1747647607, 1747647607, '038ac336', 2, 0, 0)

Line : 190
File : sessions.php