html form post is not sending variable data - php

Question

After clicking "delete" (submit): I can tell that it processes the form because I get the error "You forgot to select a vendor to delete.".
The form itself is generated using PHP. When I check the HTML output, I see that the values are there. But when it gets to POST, nothing carries over. I'm testing and using a local host, so other than the existing action link, I'm not sure what else I can modify.
I have the exact same code in another delete form and it works fine. I literally copied the other form to create this one and just changed the SQL/Variable names.
PHP Code:
#delete vendor
require('includes/mysqli_connect.php');
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
$errors = array(); //array to collect errors
//check to ensure fields are filled out
if (!empty($_POST['vendor'])) {
$vendor = trim($_POST['vendor']);
}
else {
$errors[] = "<p>You forgot to select a vendor to delete</p>";
}
if (empty($errors)) {
//insert information into appt table
$query = "UPDATE vendors_t SET active = 0 WHERE vendorID = $vendor;";
$result = mysqli_query($dbc, $query);
if($result){
echo '<div class="alert alert-success" role="alert">';
echo '<h2>Thank you!</h2>';
echo '<p> Your request to delete vendorID ' . $customerID . 'has been completed </p></div>';
} else {
echo "Error updating record: " . mysqli_error($dbc);
}
} else{
echo '<div class="alert alert-danger" role="alert"><br>';
echo '<h2>Errors Detected</h2>';
echo '<p>The following errors occured:<br/>';
foreach ($errors as $msg) {
echo "$msg<br/>\n";
}
echo '</p><p>Please try again. </p></div>';
}
}
HTML Code
<div class="container standout" >
<div class="col-lg-12">
<h2>Delete a vendor</h2>
<p> Please select a vendor to delete.</p>
</div>
<div class="row">
<form action="index.php?pagelet=deletevendor" method="post">
<div class="form-group col-md-4">
<label for="vendor">Vendors</label>
<select name="vendor" class="form-control">
<option name="vendor" selected disabled>Choose here</option>
<?php
$query = "SELECT vendorID, contactFname, contactLname, businessName FROM vendors_T WHERE active = 1;";
$result = mysqli_query($dbc, $query);
while($row = mysqli_fetch_array($result, MYSQLI_ASSOC)) {
echo '<option name="vendor" value="'.$row['vendorID'].'">'
.$row['vendorID'].' '.$row['businessName']
.' '.$row['contactFname'].' '.$row['contactLname']
.'</option>';
}?>
</select>
<br>
<br>
<input class="btn btn-primary" id="submit" type="submit" value="Delete">
</div>
</div>
</form>
</div>

Answer 1

Your option names should be the value of the vendor ID (I presume) and certainly not "vendor".

Answer 2

removing name="vendor" from options & removing selected both work.
After removing name="vendor" - I added selected back and it still works.
Thank you!!