phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '7febff38dafbf0e0cb97035d201812dd' 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 ('7febff38dafbf0e0cb97035d201812dd', -1, 1419252279, 1419252279, '365a9c64', -1, 0, 0)

Line : 187
File : sessions.php