phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '31ec81aa23901830a7f04b9386fc865f' for key 'PRIMARY'

INSERT INTO phpbb_mw_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('31ec81aa23901830a7f04b9386fc865f', -1, 1563222740, 1563222740, '2399873c', 8, 0, 0)

Line : 187
File : sessions.php