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 ('82e625b137f1eb8c0fe0723ee4d2333a', -1, 1713509320, 1713509320, '03914d72', -8, 0, 0)

Line : 187
File : sessions.php