phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '1fd2750af2d47ec8d187ef9b12b32c09' 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 ('1fd2750af2d47ec8d187ef9b12b32c09', -1, 1419192781, 1419192781, '36d3db44', -1, 0, 0)

Line : 187
File : sessions.php