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 ('4717bf26325b582dc0cb618f6da4450c', -1, 1714008802, 1714008802, '340f7045', -10, 0, 0)

Line : 187
File : sessions.php