Fail to activate LAS for MPX 5901 with error message 'No supported entitlement are available for activation'

The customer purchased MPX 5901 perpetual licenses. To support LAS, Citrix assigned new subscription licenses for MPX 5910 to replace the MPX 5901 perpetual licenses.
In MyCitrix licensing portal, we can see the following licenses. The first one is the new subscription license for MPX 5910 to replace the second one( MPX 5901 perpetual license)

When activating LAS, the available instance types includes both MPX 5901 Premium and MPX 5910 Premium. This issue will happen if we select MPX 5901 Premium because we don't have MPX5901 subscription license. What we have is MPX5910 subscription license.
Sicne the subscription license is MPX 5910 , when activating LAS, we should choose MPX5910 Premium as Instance Type to match the subscription license, rather than MPX 5901 Premium.
Note: The similar issue may exist for other types of licenses. Please make sure to choose the Instance Type which maps with your new subscription license type.
This article addresses an issue encountered when activating LAS for MPX 5901, where the error message 'No supported entitlement are available for activation' appears