-# Add a new 'visit_type' column to the 3rd_visit table
-$sth = $dbh->prepare("ALTER TABLE `3rd_visit` ADD `visit_type` enum('presidency','hometeaching') NOT NULL DEFAULT 'hometeaching' AFTER `visited`");
+# Add a new 'visit_type' column to the tc_visit table
+$sth = $dbh->prepare("ALTER TABLE `tc_visit` ADD `visit_type` enum('presidency','hometeaching') NOT NULL DEFAULT 'hometeaching' AFTER `visited`");