I had a number of Topics created using version 2.5 of Smartstore. After upgrading to v 3.1, I noticed that the URLs for the existing topics are missing. After further investigation, it looks like the code expects a DB entry in the UrlRecord table for each topic, but there are no rows with an EntityName value of Topic. Newly created topics (after the v3.1 upgrade) are correctly added to the UrlRecord table.
How should I go about resolving this?