Google Form validation from a Google Sheet for Inventory

I'm trying to make an inventory system and am struggling with using a Google form to check out inventory. I would like the form to validate that the products being removed from inventory are actually present in the inventory in a Google sheet. I've tried getting AI to write a script to accomplish this, but I can't seem to get it working. It still allows me to submit whatever I want in the text box for inventory removal. Any guidance would be greatly appreciated!

So to sum that up, can you use a column from a Google sheet for validating entries in Google form text box?

I'll include one version of the generated scripts. I've tried well over a dozen iterations, but hopefully this will provide some idea of what I've been working with.

function validateCaseNumbers(caseNumbers) {  var ss = SpreadsheetApp.getActiveSpreadsheet();  var dataSheet = ss.getSheetByName('Serialized Case Numbers');  if (!dataSheet) {    throw new Error("Unable to access the 'Serialized Case Numbers' sheet.");  }  var existingCaseNumbers = dataSheet.getRange('E:E').getValues().flat().filter(String); // Assuming case numbers are in column E  return caseNumbers.every(function(caseNumber) {    return existingCaseNumbers.includes(caseNumber);  });}function onFormSubmit(e) {  var form = FormApp.getActiveForm();  var itemResponses = e.response.getItemResponses();  var caseNumberResponse = itemResponses.find(function(response) {    return response.getItem().getTitle() === 'Case Numbers'; // Replace 'Case Numbers' with the title of your case number question in the form  });  if (!caseNumberResponse) {    // Case numbers response not found, prevent form submission    throw new Error("Case numbers response not found in form submission.");  }  var caseNumbers = caseNumberResponse.getResponse().split(',');  if (!validateCaseNumbers(caseNumbers)) {    // Display error message    var errorText = "One or more of the entered case numbers are invalid or were not checked in. Please enter valid case numbers.";    var validation = FormApp.createTextValidation()      .requireTextContainsPattern('.+') .setHelpText(errorText)      .build();    caseNumberResponse.withItemResponse(caseNumberResponse.getResponse().setValidation(validation));    throw new Error(errorText);   } }