phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9d89c27b4a2301618eeb45ea5132d608' 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 ('9d89c27b4a2301618eeb45ea5132d608', -1, 1464269174, 1464269174, '36c45b08', -1, 0, 0)

Line : 187
File : sessions.php