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 ('3ee322b7966f29cb3af629d0964aa779', -1, 1711673310, 1711673310, '2ccccc0e', -2, 0, 0)

Line : 187
File : sessions.php