phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9a48a1bc6f42f03ddc8068489200891a' 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 ('9a48a1bc6f42f03ddc8068489200891a', -1, 1550461931, 1550461931, '36d23d29', 8, 0, 0)

Line : 198
File : sessions.php