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 ('ce0a7f5621f800026c2cbe95a6a33fb8', -1, 1711663058, 1711663058, '0351de98', 7, 0, 0)

Line : 187
File : sessions.php