# Creating Filter, it deletes old created Filter

**URL:** <https://forum.dynamobim.com/t/creating-filter-it-deletes-old-created-filter/57397>\
**Category:** Revit\
**Created:** [November 18, 2020, 11:43am UTC](https://forum.dynamobim.com/t/creating-filter-it-deletes-old-created-filter/57397 "2020-11-18T11:43:24Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Brendan\_Cassidy](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/brendan_cassidy/32/7685_2.png) [@Brendan\_Cassidy](https://forum.dynamobim.com/u/Brendan_Cassidy)\
**Post date:** [November 18, 2020, 1:07pm UTC](https://forum.dynamobim.com/t/creating-filter-it-deletes-old-created-filter/57397/5 "2020-11-18T13:07:56Z")

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I would see this as a Binding issue which @jacob.small has posted about before here ([Element Binding in Revit](https://forum.dynamobim.com/t/element-binding-in-revit/31612))

This AU session should help you get a better understanding on the issues at play: [https://www.autodesk.com/autodesk-university/class/Getting-Good-Stuff-Out-Pandoras-Box-Element-Binding-Dynamo-Revit-2019](https://www.autodesk.com/autodesk-university/class/Getting-Good-Stuff-Out-Pandoras-Box-Element-Binding-Dynamo-Revit-2019)

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