how do i pass a boolean value in beforeinsert hook?

the code looks like this:

import wixData from ‘wix-data’;

export async function Products_beforeInsert(item, context) {
let result = await wixData.query(‘Collections’).find();
let currentCollection = result.items.filter(i => i.name === item.collections);

item.name = item.name;
item.genericName = item.genericName;
item.productImage = item.productImage;
item.description = item.description;
item.currency = item.currency;

// this is the code here
item.InStock = true ;

if (currentCollection.length > 0) {
item.collections = currentCollection[0]._id;
}
return item;
}

after i use import csv. it appears as literal true word in the field, not the usual checked.

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