ISSUE:7121 - warning when try to create multiple products with the sa…

[wokisajn]

…me SKU

Warning when try to add product with the same SKU

Description

Before changes when you try to save non-exist product with same SKU, attribute was incremented and it is wrong for business uses.
Now when you try to save product with same SKU, magento return a warning about it.

Fixed Issues (if relevant)

#7121: It's possible to create multiple products with the same SKU
#7121

Manual testing scenarios

1. Add a new product by panel or API with SKU which is already in database

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-cicd2]

Thank you for your submission, we really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 2 committers have signed the CLA.

✅ wokisajn
❌ ecomchallenger

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[ecomchallenger]

@magento-cicd2 thanks for information. I've already signed the CLA.

[dmanners]

Hi @wokisajn thank you for this pull requests. We have decided that we will look into this task into a bit more detail during the import/export improvements community project. As such I will close this PR as it should be covered by magento-engcom/import-export-improvements#119 and some further tasks. Thank you for the time you have invested here.