phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '0f3c1bbda6019801392f8e5798dec703' for key 1

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('0f3c1bbda6019801392f8e5798dec703', -1, 1496122395, 1496122395, '36a2881a', 4, 0, 0)

Line : 187
File : sessions.php