If you're using BG3 Mod Manager then under Tools there's a Version Generator.
Thanks for pointing this out to me. I would have never figured out how to do this myself.
Also, with some experimentation, I found the right entry to modify.
<node id="ModuleInfo">
<...snip...>
<attribute id="Version64" type="int64" value="36169534507319296"/>
Not this one ...
<children>
<node id="PublishVersion">
<attribute id="Version64" type="int64" value="1"/>