diff --git a/src/tagstudio/core/library/alchemy/library.py b/src/tagstudio/core/library/alchemy/library.py
index a25231e95..a0e7f8e23 100644
--- a/src/tagstudio/core/library/alchemy/library.py
+++ b/src/tagstudio/core/library/alchemy/library.py
@@ -1898,14 +1898,14 @@ def mirror_entry_fields(self, *entries: Entry) -> None:
         """Mirror fields among multiple Entry items."""
         fields = {}
         # load all fields
-        existing_fields = {field.type_key for field in entries[0].fields}
         for entry in entries:
             for entry_field in entry.fields:
                 fields[entry_field.type_key] = entry_field
 
-        # assign the field to all entries
+        # assign the fields to all entries
         for entry in entries:
             for field_key, field in fields.items():  # pyright: ignore[reportUnknownVariableType]
+                existing_fields = {entry_field.type_key for entry_field in entry.fields}
                 if field_key not in existing_fields:
                     self.add_field_to_entry(
                         entry_id=entry.id,
@@ -1913,6 +1913,19 @@ def mirror_entry_fields(self, *entries: Entry) -> None:
                         value=field.value,
                     )
 
+    def mirror_entry_tags(self, *entries: Entry) -> None:
+        """Mirror tags among multiple Entry items."""
+        tag_ids_set = set()
+        entry_ids = []
+        # load all entries and tags
+        for entry in entries:
+            entry_ids.append(entry.id)
+            for tag in entry.tags:
+                tag_ids_set.add(tag.id)
+        tag_ids = list(tag_ids_set)
+        # assign the tags to all entries
+        self.add_tags_to_entries(entry_ids, tag_ids)
+
     def merge_entries(self, from_entry: Entry, into_entry: Entry) -> bool:
         """Add fields and tags from the first entry to the second, and then delete the first."""
         success = True
diff --git a/src/tagstudio/core/library/alchemy/registries/dupe_files_registry.py b/src/tagstudio/core/library/alchemy/registries/dupe_files_registry.py
index d99a4f498..bb2309c51 100644
--- a/src/tagstudio/core/library/alchemy/registries/dupe_files_registry.py
+++ b/src/tagstudio/core/library/alchemy/registries/dupe_files_registry.py
@@ -49,18 +49,29 @@ def refresh_dupe_files(self, results_filepath: str | Path):
                         path_relative = file_path.relative_to(library_dir)
                     except ValueError:
                         # The file is not in the library directory
+                        logger.error("File not in library directory", file_path=file_path)
                         continue
 
                     results = self.library.search_library(
                         BrowsingState.from_path(path_relative), 500
                     )
-                    entries = self.library.get_entries(results.ids)
 
                     if not results:
                         # file not in library
+                        logger.error("No Entry matching file", path_relative=path_relative)
                         continue
 
-                    files.append(entries[0])
+                    entry = self.library.get_entry_full(results.ids[0])
+
+                    if not entry:
+                        # file not in library
+                        logger.error(
+                            "Unable to get entry",
+                            entry_id=results.ids[0],
+                            path_relative=path_relative,
+                        )
+                        continue
+                    files.append(entry)
 
                 if not len(files) > 1:
                     # only one file in the group, nothing to do
diff --git a/src/tagstudio/qt/mixed/mirror_entries_modal.py b/src/tagstudio/qt/mixed/mirror_entries_modal.py
index d67cf12ed..0e144c59a 100644
--- a/src/tagstudio/qt/mixed/mirror_entries_modal.py
+++ b/src/tagstudio/qt/mixed/mirror_entries_modal.py
@@ -95,6 +95,8 @@ def mirror_entries_runnable(self):
         mirrored: list = []
         lib = self.driver.lib
         for i, entries in enumerate(self.tracker.groups):
+            # mirror tags and fields
+            lib.mirror_entry_tags(*entries)
             lib.mirror_entry_fields(*entries)
             sleep(0.005)
             yield i