Fix #5821: NPCs from mods getting removed if mod order was changed

CHANGELOG.md

@@ -97,6 +97,7 @@
     Bug #5739: Saving and loading the save a second or two before hitting the ground doesn't count fall damage
     Bug #5758: Paralyzed actors behavior is inconsistent with vanilla
     Bug #5762: Movement solver is insufficiently robust
+    Bug #5821: NPCs from mods getting removed if mod order was changed
     Feature #390: 3rd person look "over the shoulder"
     Feature #1536: Show more information about level on menu
     Feature #2386: Distant Statics in the form of Object Paging

apps/openmw/mwworld/cellstore.cpp

@@ -921,6 +921,13 @@ namespace MWWorld
             refnum.load(reader, true, "MVRF");
             movedTo.load(reader);
 
+            if (refnum.hasContentFile())
+            {
+                auto iter = contentFileMap.find(refnum.mContentFile);
+                if (iter != contentFileMap.end())
+                    refnum.mContentFile = iter->second;
+            }
+
             // Search for the reference. It might no longer exist if its content file was removed.
             Ptr movedRef = searchViaRefNum(refnum);
             if (movedRef.isEmpty())