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 ('6d2c3b48898b686f89d7d9eb22d9a5ac', -1, 1713516973, 1713516973, '12ddebd1', -1, 0, 0)

Line : 187
File : sessions.php