Error: You have entered an Invalid Field Value for the following field: item

AI generated answer (using internal Slack threads):

The error message "You have entered an Invalid Field Value for the following field: item" typically occurs when you are trying to set a value to a field in NetSuite via SuiteScript, but the value you are trying to set is not valid for that field. This could be due to a number of reasons: 1. The value you are trying to set does not exist in the list of valid values for that field. For example, if you are trying to set an item field with an item internal id that does not exist in your NetSuite account, you will get this error. 2. The field you are trying to set is a select or list field, and you are trying to set it with a value that is not a valid option in the list. 3. The field you are trying to set is a date/time field, and you are trying to set it with a value that is not a valid date/time value. In this case, you would need to create a JavaScript Date object and set the field with that. 4. You are trying to set a field on a line item before you have selected a new line or before you have set other required fields on the line. In dynamic mode, you need to set fields in the same order you would in the UI. For example, if you are trying to create a credit memo, you would need to set the customer and subsidiary fields before setting the item field. Here is a sample code snippet that demonstrates how to correctly set fields in dynamic mode:

javascript
creditMemo.selectNewLine({
    sublistId: 'item'
});
creditMemo.setCurrentSublistValue({
    sublistId: 'item',
    fieldId: 'item',
    value: 9961
});
creditMemo.setCurrentSublistValue({
    sublistId: 'item',
    fieldId: 'quantity',
    value: 1
});
creditMemo.setCurrentSublistValue({
    sublistId: 'item',
    fieldId: 'amount',
    value: refundAmount
});    
creditMemo.commitLine({
    sublistId: 'item'
});

****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******