diff --git a/src/MeoAssistant/InfrastConfiger.cpp b/src/MeoAssistant/InfrastConfiger.cpp
index 17e2f278aa..76f2e761f3 100644
--- a/src/MeoAssistant/InfrastConfiger.cpp
+++ b/src/MeoAssistant/InfrastConfiger.cpp
@@ -197,6 +197,7 @@ bool asst::InfrastConfiger::parse(const json::value& json)
                 }
                 group.optional.emplace_back(std::move(comb));
             }
+            group.allow_external = group_json.get("allowExternal", false);
             group_vec.emplace_back(std::move(group));
         }
         m_skills_groups.emplace(facility_name, std::move(group_vec));
diff --git a/src/MeoAssistant/InfrastProductionTask.cpp b/src/MeoAssistant/InfrastProductionTask.cpp
index 2ff385bd87..cc351f7ac6 100644
--- a/src/MeoAssistant/InfrastProductionTask.cpp
+++ b/src/MeoAssistant/InfrastProductionTask.cpp
@@ -408,8 +408,9 @@ bool asst::InfrastProductionTask::optimal_calc()
             // 允许外部的话，就把单个干员凑进来
             if (group.allow_external) {
                 for (size_t i = cur_combs.size(); i != cur_max_num_of_opers; ++i) {
-                    cur_combs.emplace_back(cur_available_opers.at(i));
-                    cur_efficient += cur_available_opers.at(i).efficient.at(m_product);
+                    size_t index = i - cur_combs.size();
+                    cur_combs.emplace_back(cur_available_opers.at(index));
+                    cur_efficient += cur_available_opers.at(index).efficient.at(m_product);
                 }
             }
             else { // 否则这个组合人不够，就不可用了