phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '2060ad18c83dcea3e8ba7dbe31ae0347' for key 1

INSERT INTO phpbb2_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('2060ad18c83dcea3e8ba7dbe31ae0347', -1, 1490597012, 1490597012, '369e6d59', 19, 0, 0)

Line : 187
File : sessions.php