Fix caching harder

src/source_package_publishing_history.cpp

@@ -37,8 +37,8 @@ source_package_publishing_history::source_package_publishing_history()
 
           if (ds) {
               ds->set_lp(lp);
-              _distro_series = std::move(ds.value());
+              _distro_series = ds.value();
-              return ds;
+              return _distro_series;
           }
 
           return std::nullopt;