# \[IGN-17884, IGN-17958\] I can't delete OPC UA certificates - 8.3.9

**URL:** <https://forum.inductiveautomation.com/t/ign-17884-ign-17958-i-cant-delete-opc-ua-certificates-8-3-9/117029>\
**Category:** Ignition\
**Tags:** ignition83\
**Created:** [September 9, 2026, 8:25am UTC](https://forum.inductiveautomation.com/t/ign-17884-ign-17958-i-cant-delete-opc-ua-certificates-8-3-9/117029 "2026-09-09T08:25:04Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![m.pelagatti](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/m.pelagatti/32/68595_2.png) [@m.pelagatti](https://forum.inductiveautomation.com/u/m.pelagatti)\
**Post date:** [September 9, 2026, 8:25am UTC](https://forum.inductiveautomation.com/t/ign-17884-ign-17958-i-cant-delete-opc-ua-certificates-8-3-9/117029/1 "2026-09-09T08:25:04Z")

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Ignition Gateway 8.3.9

I tried deleting the certificates but after deleting some of them, they come back visible, is it a bug? (see gif below)

![DeleteCertificatesOPCUA](https://us1.discourse-cdn.com/inductiveautomation/original/3X/7/a/7a34613b03df7a76fdac1e08260cb7f9002b2156.gif)

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [September 9, 2026, 2:28pm UTC](https://forum.inductiveautomation.com/t/ign-17884-ign-17958-i-cant-delete-opc-ua-certificates-8-3-9/117029/2 "2026-09-09T14:28:01Z")

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This does look like a bug, thanks for the report.

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**Author:** ![m.pelagatti](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/m.pelagatti/32/68595_2.png) [@m.pelagatti](https://forum.inductiveautomation.com/u/m.pelagatti)\
**Post date:** [September 9, 2026, 2:45pm UTC](https://forum.inductiveautomation.com/t/ign-17884-ign-17958-i-cant-delete-opc-ua-certificates-8-3-9/117029/3 "2026-09-09T14:45:14Z")

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I noticed that if I change the deletion sequence, for example starting from the 3rd and going towards the bottom, it deletes them. Very strange.🙄

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [September 9, 2026, 2:49pm UTC](https://forum.inductiveautomation.com/t/ign-17884-ign-17958-i-cant-delete-opc-ua-certificates-8-3-9/117029/4 "2026-09-09T14:49:21Z")

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For now, you can delete them from the filesystem directly, if you have access.

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**Author:** ![m.pelagatti](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/m.pelagatti/32/68595_2.png) [@m.pelagatti](https://forum.inductiveautomation.com/u/m.pelagatti)\
**Post date:** [September 9, 2026, 2:50pm UTC](https://forum.inductiveautomation.com/t/ign-17884-ign-17958-i-cant-delete-opc-ua-certificates-8-3-9/117029/5 "2026-09-09T14:50:01Z")

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Yes, i have access, what is path?

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [September 9, 2026, 2:51pm UTC](https://forum.inductiveautomation.com/t/ign-17884-ign-17958-i-cant-delete-opc-ua-certificates-8-3-9/117029/6 "2026-09-09T14:51:40Z")

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I think something like:

- `$IGNITION/data/config/local/com.inductiveautomation.opcua/client/security/pki/trusted`
- `$IGNITION/data/config/local/com.inductiveautomation.opcua/server/security/pki/trusted`

for client and server respectively.

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**Author:** ![cmallonee](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/cmallonee/32/6416_2.png) [@cmallonee](https://forum.inductiveautomation.com/u/cmallonee)\
**Post date:** [September 15, 2026, 6:21pm UTC](https://forum.inductiveautomation.com/t/ign-17884-ign-17958-i-cant-delete-opc-ua-certificates-8-3-9/117029/7 "2026-09-15T18:21:54Z")

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I've opened a ticket to track this internally.