Why are Sessions Showing up in Google Analytics on an Inactive Campaign?

This article discusses why you may be seeing sessions appearing on inactive campaigns

It’s possible to see in-active UTMs in GA reporting after a campaign is ended because our creatives continue to be scanned even when the campaign is not running for our creative verification process. In order to stop UTMs from being scanned further, we will need to archive the inactive creatives within the platform, which should stop the process.

However, it's important to note that we do not want to archive any creatives within the platform that might be applied to another campaign currently running or if the creatives will run again in the future. This is because the creatives may be usable again and can be applied to an existing or future campaign that may go live again in the future.