Can't delete pageviews on version 3.9.6

Hi there!

I have a probrem with Slimstat on version 3.9.6.

My case is as follows.

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1. Go to WordPress admin > Slimstat > Settings > Maintenance > Data Maintenance > [Delete pageviews where]

2. Select [IP Adress] [equals] and enter IP Adress.

3. Submit “Apply” button.

4. “0 records deleted from your database.”
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Is anyone knows cases like this?

And if I misuse Slimstat, please tell me.

Thanks.

Kenta

https://wordpress.org/plugins/wp-slimstat/