Problems of STATUS = PROBLEM persist

[me2017]

These issues (circled in image) never expire. Why is that? Is there any way to clear them?

https://imgur.com/a/gUIzp

[kaspars.mednis]

Hi,

You must look at your trigger expression - there is some item reporting some value, which is causing the trigger problem state.

Find the item and why it is reporting wrong value on all hosts.
Maybe the item value is correct, then you must look at trigger function

Regards,
Kaspars

[me2017]

Hello and thanks. I learned these issues are still firing. I thought the 'Time' column meant was the last occurrence of the issue.