I set up an **Alert** on an Azure storage account for Average storage consumption. In order to test it, I set the threshold consumption to 2TiB (my storage has 4 TiB data). As expected, the alert was fired meaning the setup was correct. Note: While setting up the alert I had selected the option `Automatically resolve alerts`.
[![Automatically resolve alerts- Enabled][1]][1]

**Issue**:-

Now I have increased this threshold to a much higher value it should actually be. However, the "state" of the alert already fired while testing is still present. **When I try to manually change it (set it to `Closed` or `Acknowledged`), it fails**. I've tried deleting the Alert altogether and re-creating it but even that did not help either.
[![Alert State](https://i.stack.imgur.com/pYom4.png)](https://i.stack.imgur.com/pYom4.png)

[![Trying to change state](https://i.stack.imgur.com/NPhGw.png)](https://i.stack.imgur.com/NPhGw.png)

[![Unable to change state](https://i.stack.imgur.com/zIN23.png)](https://i.stack.imgur.com/zIN23.png)