diff --git a/app/src/main/java/io/legado/app/data/entities/BookChapter.kt b/app/src/main/java/io/legado/app/data/entities/BookChapter.kt
index 3203313d7..7d405d927 100644
--- a/app/src/main/java/io/legado/app/data/entities/BookChapter.kt
+++ b/app/src/main/java/io/legado/app/data/entities/BookChapter.kt
@@ -11,7 +11,7 @@ import kotlinx.android.parcel.Parcelize
 @Entity(
         tableName = "chapters",
         primaryKeys = ["url", "bookUrl"],
-        indices = [(Index(value = ["bookUrl"], unique = true)), (Index(value = ["bookUrl", "index"], unique = true))],
+    indices = [(Index(value = ["bookUrl"], unique = false)), (Index(value = ["bookUrl", "index"], unique = true))],
         foreignKeys = [(ForeignKey(
                 entity = Book::class,
                 parentColumns = ["bookUrl"],