phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '85dd0670f738011a65444a5e6a83e1e5' for key 1

INSERT INTO phpbb2_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('85dd0670f738011a65444a5e6a83e1e5', -1, 1495742845, 1495742845, '36a7dbc9', -1, 0, 0)

Line : 187
File : sessions.php