Does the dede message module add two records at a time? How can this problem be solved?

Does the dede message module add two records at a time? I changed the message module of DEDE, that is, guestbook. php $ query & quot; INSERTINTO '#@__ guestbook' (uname, face, TEL, address, qq, Email, msg, dtime, ip) & nbsp; VALUES ($ uname dede add two records at a time in the message module?
I changed the message module of DEDE, that is, guestbook. php.

$ Query = "insert into '#@__ guestbook' (uname, face, TEL, address, qq, Email, msg, dtime, ip)
VALUES ('$ uname',' $ face', '$ TEL', '$ address', '$ QQ',' $ Email ',' $ msg ', '$ dtime',' $ IP ');";

$ Dsql-> ExecuteNoneQuery ($ query );


In this way, why will two identical records be added for a single commit?

------ Solution --------------------
The program is disconnected here.
Are you sure this query method is only executed once ??