# UaException: status=Bad\_Certificate Time Invalid

**URL:** <https://forum.inductiveautomation.com/t/uaexception-status-bad-certificate-time-invalid/64910>\
**Category:** Ignition\
**Created:** [October 6, 2022, 4:57pm UTC](https://forum.inductiveautomation.com/t/uaexception-status-bad-certificate-time-invalid/64910 "2022-10-06T16:57:26Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![avaughn](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/avaughn/32/38972_2.png) [@avaughn](https://forum.inductiveautomation.com/u/avaughn)\
**Post date:** [October 7, 2022, 1:18pm UTC](https://forum.inductiveautomation.com/t/uaexception-status-bad-certificate-time-invalid/64910/4 "2022-10-07T13:18:57Z")

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As Phil mentions, the certificates get regenerated during startup once you delete them. Kevin mentions in [this](https://forum.inductiveautomation.com/t/opcua-certificate-expired/40663/2) post where those certificates are located that need to be deleted. Also, 8.1.8 introduced a [regenerate](https://docs.inductiveautomation.com/display/DOC81/OPC+UA+Security#OPCUASecurity-RegenerateCurrentCertificates) certificate option.

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