Hi Sneha,
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Please try the following:
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1. Make sure the name of the project related lists are the same in the parent site and all the sub sites
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2. Make sure the columns in all the project related lists are the same.
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3. Open the ezEdit of the qListView, go to Content –> Primary Content tab. Edit Viewed Lists. Then click the Edit button of the list in the parent site (If you haven't add the list yet, add it first). Check Include Subsites attribute and Include This Site attribute. Save the configuration.
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Thanks,
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