phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '128dc44644cfdc81a76a47840c84f698' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('128dc44644cfdc81a76a47840c84f698', -1, 1516567269, 1516567269, '36521d8d', 15, 0, 0)

Line : 187
File : sessions.php