phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9ffe637365179350dc52c324c5324e7e' 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 ('9ffe637365179350dc52c324c5324e7e', -1, 1527028292, 1527028292, '36e06c55', 26, 0, 0)

Line : 187
File : sessions.php