Why does this query blow up?

This works:

	public function attachment_upload() {

	global $mysqli;
	
	$novie_id=$_POST['id'];
	
	if(isset($_FILES['attachment_1'])&& !empty($_FILES['attachment_1']['name']))
		{
		$pathinfo = pathinfo($_FILES['attachment_1']['name']);
		$new_name = $pathinfo['filename'].'_'.$novie_id.'.'.$pathinfo['extension'];
		$base_directory= "../attachments/"; 
		$target = $base_directory.''.$new_name;
		$url = $new_name;
		$uploadOk=1; 
		$fileParts = pathinfo( $url );
		$extension = $fileParts['extension'];
			if($extension=="jpg" OR $extension=="jpeg" OR $extension=="JPG" OR $extension=="GIF" OR  $extension=="gif" OR $extension=="PNG" OR $extension=="png" OR $extension=="doc" or 
			$extension=="docx" or $extension=="pdf" OR $extension=="xls" OR $extension=="xlsx" OR $extension=="ppt" OR $extension=="pptx" OR $extension=="txt" OR $extension=="pub" OR $extension=="wps"
			or $extension=="bmp" OR $extension=="BMP")
			{
				$uploadOk = 1;
			} 
			else 
			{
				$uploadOk = 0;
				header("Location: ../project_badfile.php");
				exit();
			}
		
			
			if(!move_uploaded_file($_FILES['attachment_1']['tmp_name'], $target))  
			{
				header("Location: ../project_no_upload.php");
				exit();
			}
			else 
			{
			  
			$sql_10 = "insert into attachments (project_id, url) values ('$novie_id', '$url')";
				if(!$query_10=$mysqli->query($sql_10))
				{
					$err_10='your attachments info didn\'t get uploaded becasue:'
					. 'ERRNO: '
					.$mysqli->errno
					. 'ERROR: '
					.$mysqli->error
					. 'and the query itself looks like this: '
					.$sql_10
					.PHP_EOL;
					trigger_error($err_2, E_USER_NOTICE);
				}
			}
		}
	}

Select allOpen in new window

This, however does not:

	public function attachment_upload() {

	global $mysqli;
	
	$novie_id=$_POST['id'];
	
	if(isset($_FILES['attachment_1'])&& !empty($_FILES['attachment_1']['name']))
		{
		$pathinfo = pathinfo($_FILES['attachment_1']['name']);
		$new_name = $pathinfo['filename'].'_'.$novie_id.'.'.$pathinfo['extension'];
		$base_directory= "../attachments/"; 
		$target = $base_directory.''.$new_name;
		$url = $new_name;
		$uploadOk=1; 
		$fileParts = pathinfo( $url );
		$extension = $fileParts['extension'];
			if($extension=="jpg" OR $extension=="jpeg" OR $extension=="JPG" OR $extension=="GIF" OR  $extension=="gif" OR $extension=="PNG" OR $extension=="png" OR $extension=="doc" or 
			$extension=="docx" or $extension=="pdf" OR $extension=="xls" OR $extension=="xlsx" OR $extension=="ppt" OR $extension=="pptx" OR $extension=="txt" OR $extension=="pub" OR $extension=="wps"
			or $extension=="bmp" OR $extension=="BMP")
			{
				$uploadOk = 1;
			} 
			else 
			{
				$uploadOk = 0;
				header("Location: ../project_badfile.php");
				exit();
			}
		
			
			if(!move_uploaded_file($_FILES['attachment_1']['tmp_name'], $target))  
			{
				header("Location: ../project_no_upload.php");
				exit();
			}
			else 
			{
			  
			$sql_10 = "insert into attachments (project_id, url) values ('$novie_id', '$url')";
				if(!$query_10=$mysqli->query($sql_10))
				{
					$err_10='your attachments info didn\'t get uploaded becasue:'
					. 'ERRNO: '
					.$mysqli->errno
					. 'ERROR: '
					.$mysqli->error
					. 'and the query itself looks like this: '
					.$sql_10
					.PHP_EOL;
					trigger_error($err_2, E_USER_NOTICE);
				}
			}
		}
		
		if(isset($_FILES['attachment_2'])&& !empty($_FILES['attachment_2']['name']))
			{
			$pathinfo_1 = pathinfo($_FILES['attachment_2']['name']);
			$new_name_1 = $pathinfo_1['filename'].'_'.$novie_id.'.'.$pathinfo_1['extension'];
			$base_directory_1 = "../attachments/"; 
			$target_1 = $base_directory_1.''.$new_name_1;
			$url_1 = $new_name_1;
			$uploadOk_1=1; 
			$fileParts_1 = pathinfo( $url_1 );
			$extension_1 = $fileParts_1['extension'];
			if($extension_1=="jpg" OR $extension_1=="jpeg" OR $extension_1=="JPG" OR $extension_1=="GIF" OR  $extension_1=="gif" OR $extension_1=="PNG" OR $extension_1=="png" OR $extension_1=="doc" or 
			$extension_1=="docx" or $extension_1=="pdf" OR $extension_1=="xls" OR $extension_1=="xlsx" OR $extension_1=="ppt" OR $extension_1=="pptx" OR $extension_1=="txt" OR $extension_1=="pub" OR $extension_1=="wps" or $extension_1=="bmp" OR $extension_1=="BMP")
				{
					$uploadOk_1 = 1;
				} 
				else 
				{
					$uploadOk_1 = 0;
					header("Location: ../project_badfile.php");
					exit();
				}
			 
				if(!move_uploaded_file($_FILES['attachment_2']['tmp_name'], $target_1))  
				{
				header("Location: ../project_no_upload.php");
				exit();
				}
				else 
				{
				  
				$sql_2 = "insert into attachments (project_id, url) values ('$novie_id', '$url_1')";
					if(!$query_2=$mysqli->query($sql_2))
					{
						$err_2='your attachments info didn\'t get uploaded becasue:'
						. 'ERRNO: '
						.$mysqli->errno
						. 'ERROR: '
						.$mysqli->error
						. 'and the query itself looks like this: '
						.$sql_2
						.PHP_EOL;
						trigger_error($err_2, E_USER_NOTICE);
					}
				}
			}
		}
		

Select allOpen in new window

If I try to upload one file at a time using the "attachment_1," no problems. If I try to upload two files at the same time using both "attachment_1" and "attachment_2," it doesn't work.

What am I doing wrong?