When receiving the error below, make sure that the ASI Product Size list has unique values within the Value and Abbreviation columns.


Multiple results found for list type customlist_extend_asi_size_list for X

1. Go to Customization → Lists, Records, & Fields → Lists.


2. Find the ASI Product Size (internal id: customlist_extend_asi_size_list) in the results of custom lists.
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3. Open the ASI Product Size list to view the values within the list.
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4. Find and rename/inactivate duplicate colors or abbreviations within the list.

Example:
One of the values below would need to be updated or inactivated so that it has a unique value across both lines.