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I notice for your uniqueOpts variable you’ve declared it as:
uniqueOpts: enlist (select distinct option_id from trade)
Tables are created out of lists, so by enlisting the option_id column you are creating a list of a list.
Since we already have our list, we just want to convert this into a list format. To do this you can use the exec keyword.
Once you’ve edited this, it should work fine.
Thanks,
Megan