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 ('acefb4ef9ca94c8fd9c6cb5038b663ab', -1, 1714018883, 1714018883, '0395e906', -4, 0, 0)

Line : 187
File : sessions.php