“Unexpected error: No property schema found for nil" while importing md to logseq_db

I opened the app.logseq.com website in the DuckDuckGo browser. While importing my md-graph, I get the following error message: “Unexpected error: No property schema found for nil.” The import stops and is incomplete. Does anyone know how I can prevent this error?

I recorded the import and noticed that the error occurred after “Importing: pages/logseq-zoterolocal-plugin.md.” I don’t know how that page ended up there, but after deleting it, the error no longer occurred. However, I can’t figure out the logic behind it.