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 ('440dcc4a7a93a4cb1cb66de54b552391', -1, 1714032041, 1714032041, '12bdc1ac', -4, 0, 0)

Line : 187
File : sessions.php