Dedecms didn't find the correct UC configuration.

When you visit the Web page, you find the following information error suddenly appearing below the comment:

Error:unknown column ' app3 ' in ' WHERE clause '
errno:1054
Sql::select * from ' Dedegbk_ithov '. Uc_notelist WHERE closed= ' 0 ' and app3< ' 1 ' and app3> '-5 ' LIMIT 1

Hurriedly enter Dede backstage Ucenter module, appear "Dedecms did not find the correct UC configuration!" "Hint ~! Here are some solutions ~!
Open the/include/common.inc.php file.

Define (' Uc_connect ', ' MySQL ');
Define (' uc_dbhost ', ' localhost ');
Define (' Uc_dbuser ', ' root ');
Define (' UC_DBPW ', ');
Define (' Uc_dbname ', ');
Define (' Uc_dbcharset ', ');
Define (' Uc_dbtablepre ', ');
Define (' Uc_dbconnect ', ' 0 ');
Define (' Uc_key ', ');
Define (' Uc_api ', ');
Define (' Uc_charset ', ');
Define (' Uc_ip ', ' 127.0.0.1 ');
Define (' Uc_appid ', ' 1 ');
Define (' uc_ppp ', ' 20 ');

Then reconfigure the Ucenter module to resolve!

Then enter the Ucenter User Management Center, the DEDECMS to generate a new communication key to fill in.