Thanks for your work on this extension !

I noticed that there is a bug leading to papers not beeing added in the database.
Once you have duplicated the database, it is possible to add papers without issues. However if you add a new property (just a new column in the database, no need to populate the property), then papers are no longer added. Deleting the property restores the ability to add papers.

This is a strong limitation. Adding custom properties could allow user to do custom board to track reading for example !
Do you think there is a way to correct this behaviour ?