SQLite database in asset bundles

We have some SQLite databases we use to hold game data, and I am attempting to add them to their own AssetBundles. I get the following warning when trying to build the asset bundles:

Unrecognized assets cannot be included in AssetBundle

And their bundles do not build. Which is puzzling, because the documentation for Asset Bundles mentions being able to add custom binary data. Even strange is, if I add another file type to the bundle, such as a PNG, it still emits the warning but the bundles appear to build and the SQLite files are in the manifest. I'm not sure what I can do to just build the bundle with the SQLite file, but I am hoping I don't have to add an arbitrary data file to each bundle to make it work. Any ideas?

 

Is there a more appropriate forum to post this in? I realize this subforum may be specific to some new AssetBundle tools being developed, so if there's a more appropriate forum I'll happily ask there.