diff --git a/td/telegram/AnimationsManager.cpp b/td/telegram/AnimationsManager.cpp
index 1c9c386d0..129c149b0 100644
--- a/td/telegram/AnimationsManager.cpp
+++ b/td/telegram/AnimationsManager.cpp
@@ -178,7 +178,7 @@ FileId AnimationsManager::on_get_animation(unique_ptr<Animation> new_animation,
     CHECK(a->file_id == file_id);
     if (a->mime_type != new_animation->mime_type) {
       LOG(DEBUG) << "Animation " << file_id << " info has changed";
-      a->mime_type = new_animation->mime_type;
+      a->mime_type = std::move(new_animation->mime_type);
     }
     if (a->file_name != new_animation->file_name) {
       LOG(DEBUG) << "Animation " << file_id << " file name has changed";
@@ -202,7 +202,7 @@ FileId AnimationsManager::on_get_animation(unique_ptr<Animation> new_animation,
         LOG(INFO) << "Animation " << file_id << " thumbnail has changed from " << a->thumbnail << " to "
                   << new_animation->thumbnail;
       }
-      a->thumbnail = new_animation->thumbnail;
+      a->thumbnail = std::move(new_animation->thumbnail);
     }
     if (a->animated_thumbnail != new_animation->animated_thumbnail) {
       if (!a->animated_thumbnail.file_id.is_valid()) {
@@ -211,7 +211,7 @@ FileId AnimationsManager::on_get_animation(unique_ptr<Animation> new_animation,
         LOG(INFO) << "Animation " << file_id << " animated thumbnail has changed from " << a->animated_thumbnail
                   << " to " << new_animation->animated_thumbnail;
       }
-      a->animated_thumbnail = new_animation->animated_thumbnail;
+      a->animated_thumbnail = std::move(new_animation->animated_thumbnail);
     }
     if (a->has_stickers != new_animation->has_stickers && new_animation->has_stickers) {
       a->has_stickers = new_animation->has_stickers;
diff --git a/td/telegram/AudiosManager.cpp b/td/telegram/AudiosManager.cpp
index f0fb7721e..f1e9164a0 100644
--- a/td/telegram/AudiosManager.cpp
+++ b/td/telegram/AudiosManager.cpp
@@ -101,13 +101,13 @@ FileId AudiosManager::on_get_audio(unique_ptr<Audio> new_audio, bool replace) {
     CHECK(a->file_id == new_audio->file_id);
     if (a->mime_type != new_audio->mime_type) {
       LOG(DEBUG) << "Audio " << file_id << " info has changed";
-      a->mime_type = new_audio->mime_type;
+      a->mime_type = std::move(new_audio->mime_type);
     }
     if (a->duration != new_audio->duration || a->title != new_audio->title || a->performer != new_audio->performer) {
       LOG(DEBUG) << "Audio " << file_id << " info has changed";
       a->duration = new_audio->duration;
-      a->title = new_audio->title;
-      a->performer = new_audio->performer;
+      a->title = std::move(new_audio->title);
+      a->performer = std::move(new_audio->performer);
     }
     if (a->file_name != new_audio->file_name) {
       LOG(DEBUG) << "Audio " << file_id << " file name has changed";
@@ -126,7 +126,7 @@ FileId AudiosManager::on_get_audio(unique_ptr<Audio> new_audio, bool replace) {
         LOG(INFO) << "Audio " << file_id << " thumbnail has changed from " << a->thumbnail << " to "
                   << new_audio->thumbnail;
       }
-      a->thumbnail = new_audio->thumbnail;
+      a->thumbnail = std::move(new_audio->thumbnail);
     }
   }
 
diff --git a/td/telegram/DocumentsManager.cpp b/td/telegram/DocumentsManager.cpp
index 2085762a5..24a1eb87b 100644
--- a/td/telegram/DocumentsManager.cpp
+++ b/td/telegram/DocumentsManager.cpp
@@ -545,11 +545,11 @@ FileId DocumentsManager::on_get_document(unique_ptr<GeneralDocument> new_documen
     CHECK(d->file_id == new_document->file_id);
     if (d->mime_type != new_document->mime_type) {
       LOG(DEBUG) << "Document " << file_id << " mime_type has changed";
-      d->mime_type = new_document->mime_type;
+      d->mime_type = std::move(new_document->mime_type);
     }
     if (d->file_name != new_document->file_name) {
       LOG(DEBUG) << "Document " << file_id << " file_name has changed";
-      d->file_name = new_document->file_name;
+      d->file_name = std::move(new_document->file_name);
     }
     if (d->minithumbnail != new_document->minithumbnail) {
       d->minithumbnail = std::move(new_document->minithumbnail);
@@ -561,7 +561,7 @@ FileId DocumentsManager::on_get_document(unique_ptr<GeneralDocument> new_documen
         LOG(INFO) << "Document " << file_id << " thumbnail has changed from " << d->thumbnail << " to "
                   << new_document->thumbnail;
       }
-      d->thumbnail = new_document->thumbnail;
+      d->thumbnail = std::move(new_document->thumbnail);
     }
   }
 
diff --git a/td/telegram/VideoNotesManager.cpp b/td/telegram/VideoNotesManager.cpp
index 63953b777..2cc0dfaab 100644
--- a/td/telegram/VideoNotesManager.cpp
+++ b/td/telegram/VideoNotesManager.cpp
@@ -71,7 +71,7 @@ FileId VideoNotesManager::on_get_video_note(unique_ptr<VideoNote> new_video_note
         LOG(INFO) << "Video note " << file_id << " thumbnail has changed from " << v->thumbnail << " to "
                   << new_video_note->thumbnail;
       }
-      v->thumbnail = new_video_note->thumbnail;
+      v->thumbnail = std::move(new_video_note->thumbnail);
     }
   }
   return file_id;
diff --git a/td/telegram/VideosManager.cpp b/td/telegram/VideosManager.cpp
index eb60456d9..946b96dca 100644
--- a/td/telegram/VideosManager.cpp
+++ b/td/telegram/VideosManager.cpp
@@ -63,7 +63,7 @@ FileId VideosManager::on_get_video(unique_ptr<Video> new_video, bool replace) {
     CHECK(v->file_id == new_video->file_id);
     if (v->mime_type != new_video->mime_type) {
       LOG(DEBUG) << "Video " << file_id << " MIME type has changed";
-      v->mime_type = new_video->mime_type;
+      v->mime_type = std::move(new_video->mime_type);
     }
     if (v->duration != new_video->duration || v->dimensions != new_video->dimensions ||
         v->supports_streaming != new_video->supports_streaming) {
@@ -86,7 +86,7 @@ FileId VideosManager::on_get_video(unique_ptr<Video> new_video, bool replace) {
         LOG(INFO) << "Video " << file_id << " thumbnail has changed from " << v->thumbnail << " to "
                   << new_video->thumbnail;
       }
-      v->thumbnail = new_video->thumbnail;
+      v->thumbnail = std::move(new_video->thumbnail);
     }
     if (v->animated_thumbnail != new_video->animated_thumbnail) {
       if (!v->animated_thumbnail.file_id.is_valid()) {
@@ -95,7 +95,7 @@ FileId VideosManager::on_get_video(unique_ptr<Video> new_video, bool replace) {
         LOG(INFO) << "Video " << file_id << " animated thumbnail has changed from " << v->animated_thumbnail << " to "
                   << new_video->animated_thumbnail;
       }
-      v->animated_thumbnail = new_video->animated_thumbnail;
+      v->animated_thumbnail = std::move(new_video->animated_thumbnail);
     }
     if (v->has_stickers != new_video->has_stickers && new_video->has_stickers) {
       v->has_stickers = new_video->has_stickers;
diff --git a/td/telegram/VoiceNotesManager.cpp b/td/telegram/VoiceNotesManager.cpp
index 0fa497a37..182e487f2 100644
--- a/td/telegram/VoiceNotesManager.cpp
+++ b/td/telegram/VoiceNotesManager.cpp
@@ -168,12 +168,12 @@ FileId VoiceNotesManager::on_get_voice_note(unique_ptr<VoiceNote> new_voice_note
     CHECK(v->file_id == new_voice_note->file_id);
     if (v->mime_type != new_voice_note->mime_type) {
       LOG(DEBUG) << "Voice note " << file_id << " info has changed";
-      v->mime_type = new_voice_note->mime_type;
+      v->mime_type = std::move(new_voice_note->mime_type);
     }
     if (v->duration != new_voice_note->duration || v->waveform != new_voice_note->waveform) {
       LOG(DEBUG) << "Voice note " << file_id << " info has changed";
       v->duration = new_voice_note->duration;
-      v->waveform = new_voice_note->waveform;
+      v->waveform = std::move(new_voice_note->waveform);
     }
     if (new_voice_note->is_transcribed && v->transcription_id == 0) {
       CHECK(!v->is_transcribed);