phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'e936fc4aaa36216199b3b8aa7c10e3df' 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 ('e936fc4aaa36216199b3b8aa7c10e3df', -1, 1488031063, 1488031063, '36a605e6', 0, 0, 0)

Line : 187
File : sessions.php