Some marketplace fields only accept a fixed list of values instead of free text. For example, a Size or Condition field might only accept a handful of specific words. If you send a value that isn't on the list, the channel rejects it. Your Posting Template shows the accepted values for any field that has them, so you can match the list exactly before you update an item.
Find the allowed values for one item
Go to CATALOG > Items and open the item using the eye icon on its row. Clicking the row itself doesn't open it.
Open the Channel Status tab and find the sales channel you're checking. This tells you which Posting Template is mapped for that channel.
Go to CHANNELS > Integrations, open that channel, click Edit, and go to its Posting Templates tab.
Open the Posting Template that matches the mapping from step 2, then use Search attributes to find the field.
Click the field to expand it. If it has a fixed list, the accepted values appear under "Only these values will be accepted by the integration". For example, a Size field might only accept Small, Medium and Large.
Use one of those values exactly, with the same spelling and case, when you update the item.
Checking values for many items at once
Updating items one at a time doesn't scale. Generate a Super Template for the channel and category instead. It's a spreadsheet of your items' channel-specific data, so you can see and correct values across many items before importing the fixed file back in. See How to Generate and Import a Super Template for the full walkthrough.
If the field isn't mapped at all yet, Building a Posting Template: A How-To Guide covers setting up the mapping from scratch.
Troubleshooting & FAQ
The field doesn't show any allowed values. Not every field has a fixed list. If nothing appears under the field, it accepts free text.
My value matches the list, but the channel still rejects it. Double-check spelling and case: "Small" and "small" aren't the same to most channels. Then see How to Fix Marketplace Listing Errors for the exact rejection reason.
I don't see the attribute on the template at all. It may not be mapped for that category yet. See Building a Posting Template: A How-To Guide, and confirm you're on the Posting Template for the right category.
The field accepts more than one value. Multi-value fields show an Add value button for each extra entry. See How to Address Adding Additional Target+’s MTA Values for a Target+ walkthrough.
How long until a corrected value reaches the channel? For Target+, Acenda usually sends the corrected value within an hour, and Target may take longer to process it. Timing varies by channel.
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Still stuck? Contact Acenda Support and we'll help you find the right value.