diff --git a/src/ScadaLink.ManagementService/ManagementActor.cs b/src/ScadaLink.ManagementService/ManagementActor.cs
index 8b69783..e259012 100644
--- a/src/ScadaLink.ManagementService/ManagementActor.cs
+++ b/src/ScadaLink.ManagementService/ManagementActor.cs
@@ -1838,22 +1838,29 @@ public class ManagementActor : ReceiveActor
                 $"Bundle has {blockers.Count} blocker(s); import aborted. {details}");
         }
 
+        // Dedupe by (EntityType, Name) -- the preview can emit multiple rows per
+        // entity (e.g. one row per modified member of a template), but ApplyAsync
+        // requires a unique resolution per key. Last-write-wins matches the
+        // Central UI's TransportImport.BuildDefaultResolutions behavior.
         var renameStamp = DateTime.UtcNow.ToString("yyyyMMdd-HHmmss");
-        var resolutions = preview.Items.Select(item => new ImportResolution(
-            item.EntityType,
-            item.Name,
-            item.Kind switch
+        var resolutionsMap = new Dictionary<(string, string), ImportResolution>();
+        foreach (var item in preview.Items)
+        {
+            var action = item.Kind switch
             {
                 ConflictKind.New => ResolutionAction.Add,
                 ConflictKind.Identical => ResolutionAction.Skip,
                 ConflictKind.Modified => policy,
                 _ => ResolutionAction.Skip,
-            },
-            (item.Kind == ConflictKind.Modified && policy == ResolutionAction.Rename)
+            };
+            var renameTo = (item.Kind == ConflictKind.Modified && policy == ResolutionAction.Rename)
                 ? $"{item.Name}-imported-{renameStamp}"
-                : null)).ToList();
+                : null;
+            resolutionsMap[(item.EntityType, item.Name)] = new ImportResolution(
+                item.EntityType, item.Name, action, renameTo);
+        }
 
-        return await importer.ApplyAsync(session.SessionId, resolutions, username);
+        return await importer.ApplyAsync(session.SessionId, resolutionsMap.Values.ToList(), username);
     }
 
     private static byte[] DecodeBundle(string base64)