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 ('907677af3e897ea212618e416cc800fd', -1, 1594296565, 1594296565, '23a87091', 3, 0, 0)

Line : 187
File : sessions.php