# Datatypes not staying fiwed

**URL:** <https://forum.inductiveautomation.com/t/datatypes-not-staying-fiwed/31481>\
**Category:** Ignition\
**Created:** [January 21, 2020, 6:29pm UTC](https://forum.inductiveautomation.com/t/datatypes-not-staying-fiwed/31481 "2020-01-21T18:29:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![athayer](https://avatars.discourse-cdn.com/v4/letter/a/eb8c5e/32.png) [@athayer](https://forum.inductiveautomation.com/u/athayer)\
**Post date:** [January 21, 2020, 6:29pm UTC](https://forum.inductiveautomation.com/t/datatypes-not-staying-fiwed/31481/1 "2020-01-21T18:29:40Z")

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I am having issues with tags created using a datatype reverting to an older version.  
I have several identical pieces of equipment that I created a datatype for.  
As I progress in the project I add more items to the datatype.  
On at least (2) occasions I have had the the machine tags revert to an ancient ( many revs ago) datatype.  
I have to reassign the datatype to force the tag group to act correctly.  
What am I doing wrong?