diff --git a/komga/src/main/kotlin/org/gotson/komga/infrastructure/jooq/BookDtoDao.kt b/komga/src/main/kotlin/org/gotson/komga/infrastructure/jooq/BookDtoDao.kt
index 1a274df70..ea6891614 100644
--- a/komga/src/main/kotlin/org/gotson/komga/infrastructure/jooq/BookDtoDao.kt
+++ b/komga/src/main/kotlin/org/gotson/komga/infrastructure/jooq/BookDtoDao.kt
@@ -206,11 +206,11 @@ class BookDtoDao(
   }
 
   override fun findAllDuplicates(userId: String, pageable: Pageable): Page<BookDto> {
-    val hashes = dsl.select(b.FILE_HASH, DSL.count(b.FILE_HASH))
+    val hashes = dsl.select(b.FILE_HASH, DSL.count(b.ID))
       .from(b)
       .where(b.FILE_HASH.ne(""))
-      .groupBy(b.FILE_HASH)
-      .having(DSL.count(b.FILE_HASH).gt(1))
+      .groupBy(b.FILE_HASH, b.FILE_SIZE)
+      .having(DSL.count(b.ID).gt(1))
       .fetch()
       .associate { it.value1() to it.value2() }
 
diff --git a/komga/src/test/kotlin/org/gotson/komga/infrastructure/jooq/BookDtoDaoTest.kt b/komga/src/test/kotlin/org/gotson/komga/infrastructure/jooq/BookDtoDaoTest.kt
index 4c83502a9..83e47370e 100644
--- a/komga/src/test/kotlin/org/gotson/komga/infrastructure/jooq/BookDtoDaoTest.kt
+++ b/komga/src/test/kotlin/org/gotson/komga/infrastructure/jooq/BookDtoDaoTest.kt
@@ -37,6 +37,7 @@ import org.junit.jupiter.api.extension.ExtendWith
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.boot.test.context.SpringBootTest
 import org.springframework.data.domain.PageRequest
+import org.springframework.data.domain.Pageable
 import org.springframework.data.domain.Sort
 import org.springframework.test.context.junit.jupiter.SpringExtension
 import java.net.URL
@@ -700,4 +701,44 @@ class BookDtoDaoTest(
       assertThat(found).hasSize(1)
     }
   }
+
+  @Nested
+  inner class Duplicates {
+    @Test
+    fun `given books with same hash and size when searching then results are returned`() {
+      // given
+      seriesLifecycle.addBooks(
+        series,
+        listOf(
+          makeBook("Book 1", seriesId = series.id, libraryId = library.id).copy(fileHash = "hashed", fileSize = 10),
+          makeBook("Book 2", seriesId = series.id, libraryId = library.id).copy(fileHash = "hashed", fileSize = 10),
+        ),
+      )
+
+      // when
+      val found = bookDtoDao.findAllDuplicates(user.id, Pageable.unpaged(),).content
+
+      // then
+      assertThat(found).hasSize(2)
+      assertThat(found.map { it.name }).containsExactlyInAnyOrder("Book 1", "Book 2")
+    }
+
+    @Test
+    fun `given books with same hash but different size when searching then no results are returned`() {
+      // given
+      seriesLifecycle.addBooks(
+        series,
+        listOf(
+          makeBook("Book 1", seriesId = series.id, libraryId = library.id).copy(fileHash = "hashed", fileSize = 10),
+          makeBook("Book 2", seriesId = series.id, libraryId = library.id).copy(fileHash = "hashed", fileSize = 12),
+        ),
+      )
+
+      // when
+      val found = bookDtoDao.findAllDuplicates(user.id, Pageable.unpaged(),).content
+
+      // then
+      assertThat(found).isEmpty()
+    }
+  }
 }