How to change icon.

I got log that "You have changed the icon for ~", but icon was not changed. There is no error and warning.

I set assets, Alternate App Icon Sets, info and checked "include all app icon assets".

here is info

<key>CFBundleIcons</key>
    <dict>
        <key>CFBundlePrimaryIcon</key>
        <dict>
            <key>CFBundleIconFiles</key>
            <array>
                <string>AppIcon</string>
            </array>
            <key>UIPrerenderedIcon</key>
            <false/>
        </dict>
        <key>CFBundleAlternateIcons</key>
        <dict>
            <key>blackCircle</key>
            <dict>
                <key>CFBundleIconFiles</key>
                <array>
                    <string>blackCircle</string>
                </array>
                <key>UIPrerenderedIcon</key>
                <false/>
            </dict>
        </dict>
    </dict>

blackCircle is a name of image in assets. I wrote blackCircle in Alternate App Icon Sets.

I don't know what to do. I tried all I could find in website