# Duplicates in my collapsed table
**URL:** https://forum.qiime2.org/t/duplicates-in-my-collapsed-table/17651
**Category:** Technical Support
**Created:** [December 1, 2020, 7:53am UTC](https://forum.qiime2.org/t/duplicates-in-my-collapsed-table/17651 "2020-12-01T07:53:28Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Nisha](https://forum.qiime2.org/u/Nisha)
#### Post date: [December 1, 2020, 7:53am UTC](https://forum.qiime2.org/t/duplicates-in-my-collapsed-table/17651/1 "2020-12-01T07:53:28Z")
Hi Again!
I have collapsed my features table at level 6, that is genus. Ideally it must have all unique genera.
But the table I have, has duplicates.
For eg: let say genus "Prevotella". I have this genus with different abundance values for each sample.
I also have "[Prevotella]", in square brackets.it also has some values for each sample.
How is it possible?
Genus is same but still it is REPEATING.
Best
Nisha
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### Author:  [@Nicholas\_Bokulich](https://forum.qiime2.org/u/Nicholas_Bokulich)
#### Post date: [December 1, 2020, 1:31pm UTC](https://forum.qiime2.org/t/duplicates-in-my-collapsed-table/17651/2 "2020-12-01T13:31:53Z")
Hi @Nisha,
This is not really a duplicate, as described below. This is a feature of the reference taxonomy that you are using.
> [@Nisha](#):
>
> I also have “[Prevotella]”, in square brackets.it also has some values for each sample.
Square brackets are official NCBI taxonomic nomenclature, indicating known misclassifications in the reference taxonomy. See here for details:
> **[NCBI Taxonomy: a comprehensive update on curation, resources and tools](https://pmc.ncbi.nlm.nih.gov/articles/PMC7408187/)**
>
> The National Center for Biotechnology Information (NCBI) Taxonomy includes organism names and classifications for every sequence in the nucleotide and protein sequence databases of the International Nucleotide Sequence Database Collaboration. Since...
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### Author:  [@Nicholas\_Bokulich](https://forum.qiime2.org/u/Nicholas_Bokulich)
#### Post date: [December 5, 2020, 7:24am UTC](https://forum.qiime2.org/t/duplicates-in-my-collapsed-table/17651/3 "2020-12-05T07:24:13Z")
2 posts were split to a new topic: [how reliable are my taxonomic classifications if I did not identify species?](https://forum.qiime2.org/t/how-reliable-are-my-taxonomic-classifications-if-i-did-not-identify-species/17696)
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### Author:  [@system](https://forum.qiime2.org/u/system)
#### Post date: [January 5, 2021, 1:24pm UTC](https://forum.qiime2.org/t/duplicates-in-my-collapsed-table/17651/4 "2021-01-05T13:24:18Z")
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