phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('7c971f645248e03205b57e30b57e9fcf', -1, 1715112012, 1715112012, '12bcdab8', -1, 0, 0)

Line : 189
File : sessions.php