phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('72aafe6640eee7623899fe6db504adc1', -1, 1566502929, 1566502929, '12e8ab12', 16, 0, 0)

Line : 189
File : sessions.php