# Artifact API Import Error for Series of Sequences

**URL:** https://forum.qiime2.org/t/artifact-api-import-error-for-series-of-sequences/15886
**Category:** User Support
**Tags:** artifact-api
**Created:** [July 28, 2020, 8:28pm UTC](https://forum.qiime2.org/t/artifact-api-import-error-for-series-of-sequences/15886 "2020-07-28T20:28:22Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![thermokarst](https://forum.qiime2.org/letter_avatar_proxy/v4/letter/t/8e7dd6/32.png) [@thermokarst](https://forum.qiime2.org/u/thermokarst)
#### Post date: [July 28, 2020, 11:55pm UTC](https://forum.qiime2.org/t/artifact-api-import-error-for-series-of-sequences/15886/6 "2020-07-28T23:55:31Z")

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Hey @jwdebelius!

This part of the first traceback jumped out at me:

> [@jwdebelius](#):
>
> ```auto
> 136 raise ValueError("Transformer from %r to %r already exists."
> --> 137 % transformer_record)
> 
> ```

That bit of the framework checks for duplicated transformers, and according to that it found one... What plugins do you have in this env?

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