phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '59d86152cdb03deebfcdea404998a67d' 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 ('59d86152cdb03deebfcdea404998a67d', -1, 1496115965, 1496115965, '36c67666', 14, 0, 0)

Line : 187
File : sessions.php