VALUE aggregator can't be used with calculated metrics. Try another aggregator

Hi,

I have a calculated metric below which worked fine for months and now all of a sudden I replicated the metric to use a different value and receiving an error.

Error: VALUE aggregator can't be used with calculated metrics. Try another aggregator.

IF (VALUE(First reply time - Business hours (hrs)) < 10)
THEN [Ticket ID]
ENDIF

I then have a Result metric calculation to calculate the %.

In https://support.zendesk.com/hc/en-us/community/posts/4413237775514-Help-with-creating-Explore-report-to-measure-that-took-longer-than-XX-time-to-reply-to the VALUE aggregator is also used.