diff -r b3d458a90aeb -r a8f452f7c503 src/Pure/PIDE/document_info.scala
--- a/src/Pure/PIDE/document_info.scala	Fri Dec 16 17:30:29 2022 +0100
+++ b/src/Pure/PIDE/document_info.scala	Fri Dec 16 17:51:52 2022 +0100
@@ -113,7 +113,7 @@
     def read_session(session_name: String): Document_Info.Session = {
       val static_theories = deps(session_name).used_theories.map(_._1.theory)
       val (thys, build_uuid) = {
-        using(database_context.open_session(deps.base_info(session_name))) { session_context =>
+        using(database_context.open_session(deps.background(session_name))) { session_context =>
           val thys =
             for {
               theory_name <- static_theories