# Learn from my nightmare (just wanted my old customers in new biz)

**URL:** <https://forum.manager.io/t/learn-from-my-nightmare-just-wanted-my-old-customers-in-new-biz/6797>\
**Category:** Uncategorized\
**Created:** [August 26, 2016, 6:23pm UTC](https://forum.manager.io/t/learn-from-my-nightmare-just-wanted-my-old-customers-in-new-biz/6797 "2016-08-26T18:23:05Z")\
**Posts on this page:** 1\
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**Author:** ![devan](https://avatars.discourse-cdn.com/v4/letter/d/13edae/32.png) [@devan](https://forum.manager.io/u/devan)\
**Post date:** [December 15, 2016, 10:36pm UTC](https://forum.manager.io/t/learn-from-my-nightmare-just-wanted-my-old-customers-in-new-biz/6797/15 "2016-12-15T22:36:09Z")

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From the explanation given by lubos in the Guide at [Using batch operations on inventory items](https://forum.manager.io/t/using-batch-operations-on-inventory-items/5499), I’m assuming that the Key column functions like a record index.

“Do not remove or modify any content in the Key column. You can remove any rows you don’t need to update from the spreadsheet.”

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