diff --git a/cache/cache.py b/cache/cache.py
index 1fab2140..faaf0bd8 100644
--- a/cache/cache.py
+++ b/cache/cache.py
@@ -177,7 +177,7 @@ async def get_cached_authors_by_ids(author_ids: List[int]) -> List[dict]:
         missing_ids = [author_ids[index] for index in missing_indices]
         with local_session() as session:
             query = select(Author).where(Author.id.in_(missing_ids))
-            missing_authors = session.execute(query).scalars().all()
+            missing_authors = session.execute(query).scalars().unique().all()
             await asyncio.gather(*(cache_author(author.dict()) for author in missing_authors))
             for index, author in zip(missing_indices, missing_authors):
                 authors[index] = author.dict()
diff --git a/resolvers/author.py b/resolvers/author.py
index 53d9ba0b..80177416 100644
--- a/resolvers/author.py
+++ b/resolvers/author.py
@@ -47,7 +47,7 @@ async def get_all_authors(current_user_id=None):
         with local_session() as session:
             # Запрос на получение базовой информации об авторах
             authors_query = select(Author).where(Author.deleted_at.is_(None))
-            authors = session.execute(authors_query).scalars().all()
+            authors = session.execute(authors_query).scalars().unique().all()
 
             # Преобразуем авторов в словари с учетом прав доступа
             return [author.dict(current_user_id, False) for author in authors]
@@ -174,7 +174,7 @@ async def get_authors_with_stats(limit=50, offset=0, by: Optional[str] = None, c
             base_query = base_query.limit(limit).offset(offset)
 
             # Получаем авторов
-            authors = session.execute(base_query).scalars().all()
+            authors = session.execute(base_query).scalars().unique().all()
             author_ids = [author.id for author in authors]
 
             if not author_ids:
@@ -418,7 +418,7 @@ async def load_authors_search(_, info, text: str, limit: int = 10, offset: int =
     with local_session() as session:
         # Simple query to get authors by IDs - no need for stats here
         authors_query = select(Author).filter(Author.id.in_(author_ids))
-        db_authors = session.execute(authors_query).scalars().all()
+        db_authors = session.execute(authors_query).scalars().unique().all()
 
     if not db_authors:
         return []
diff --git a/resolvers/reaction.py b/resolvers/reaction.py
index e31711b2..02d4c028 100644
--- a/resolvers/reaction.py
+++ b/resolvers/reaction.py
@@ -79,7 +79,9 @@ def get_reactions_with_stat(q, limit=10, offset=0):
     >>> get_reactions_with_stat(q, 10, 0)  # doctest: +SKIP
     [{'id': 1, 'body': 'Текст комментария', 'stat': {'rating': 5, 'comments_count': 3}, ...}]
     """
-    q = q.distinct().limit(limit).offset(offset)
+    # Убираем distinct() поскольку GROUP BY уже обеспечивает уникальность,
+    # а distinct() вызывает ошибку PostgreSQL с JSON полями
+    q = q.limit(limit).offset(offset)
     reactions = []
 
     with local_session() as session:
diff --git a/resolvers/topic.py b/resolvers/topic.py
index 8e2fa642..a329dbaf 100644
--- a/resolvers/topic.py
+++ b/resolvers/topic.py
@@ -37,7 +37,7 @@ async def get_all_topics():
         with local_session() as session:
             # Запрос на получение базовой информации о темах
             topics_query = select(Topic)
-            topics = session.execute(topics_query).scalars().all()
+            topics = session.execute(topics_query).scalars().unique().all()
 
             # Преобразуем темы в словари
             return [topic.dict() for topic in topics]
@@ -103,7 +103,7 @@ async def get_topics_with_stats(limit=100, offset=0, community_id=None, by=None)
             base_query = base_query.limit(limit).offset(offset)
 
             # Получаем темы
-            topics = session.execute(base_query).scalars().all()
+            topics = session.execute(base_query).scalars().unique().all()
             topic_ids = [topic.id for topic in topics]
 
             if not topic_ids: