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 ('c7cf3c9352600654e917a69631c2d664', -1, 1714024007, 1714024007, '12758e80', -11, 0, 0)

Line : 187
File : sessions.php