I get this error now
Notice: Undefined index: WADA_RepeatID_DetailsID_0 in /home/l4onkda599e9/public_html/orders-for-excel.php on line 40
There is an error in your SQL syntax.
This is the line
$UpdateQuery->addFilter($MultipleUpdateIndexColumn, "=", $MultipleUpdateIndexColumnType, $_POST[$MultipleUpdateIdentifier."_".$MultipleUpdateCount]);
$UpdateQuery->execute();