diff --git a/PiwigoDirectorySync/Migrations/20230911213151_AlbumPathIsUniqueWithinServer.Designer.cs b/PiwigoDirectorySync/Migrations/20230911213151_AlbumPathIsUniqueWithinServer.Designer.cs
new file mode 100644
index 0000000..964d585
--- /dev/null
+++ b/PiwigoDirectorySync/Migrations/20230911213151_AlbumPathIsUniqueWithinServer.Designer.cs
@@ -0,0 +1,159 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using PiwigoDirectorySync.Persistence;
+
+#nullable disable
+
+namespace PiwigoDirectorySync.Migrations
+{
+    [DbContext(typeof(PersistenceContext))]
+    [Migration("20230911213151_AlbumPathIsUniqueWithinServer")]
+    partial class AlbumPathIsUniqueWithinServer
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder.HasAnnotation("ProductVersion", "7.0.10");
+
+            modelBuilder.Entity("PiwigoDirectorySync.Persistence.AlbumEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("ParentId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Path")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("ServerAlbumId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ServerId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ParentId");
+
+                    b.HasIndex("ServerAlbumId");
+
+                    b.HasIndex("ServerId", "Path")
+                        .IsUnique();
+
+                    b.ToTable("PiwigoAlbums");
+                });
+
+            modelBuilder.Entity("PiwigoDirectorySync.Persistence.ImageEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("AlbumId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("DeleteRequired")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("FilePath")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("LastChange")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Md5Sum")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("ServerImageId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("UploadRequired")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ServerImageId");
+
+                    b.HasIndex("AlbumId", "FilePath");
+
+                    b.ToTable("PiwigoImages");
+                });
+
+            modelBuilder.Entity("PiwigoDirectorySync.Persistence.ServerEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("RootDirectory")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Url")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Username")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Name")
+                        .IsUnique();
+
+                    b.ToTable("PiwigoServers");
+                });
+
+            modelBuilder.Entity("PiwigoDirectorySync.Persistence.AlbumEntity", b =>
+                {
+                    b.HasOne("PiwigoDirectorySync.Persistence.AlbumEntity", "Parent")
+                        .WithMany()
+                        .HasForeignKey("ParentId");
+
+                    b.HasOne("PiwigoDirectorySync.Persistence.ServerEntity", "Server")
+                        .WithMany()
+                        .HasForeignKey("ServerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Parent");
+
+                    b.Navigation("Server");
+                });
+
+            modelBuilder.Entity("PiwigoDirectorySync.Persistence.ImageEntity", b =>
+                {
+                    b.HasOne("PiwigoDirectorySync.Persistence.AlbumEntity", "Album")
+                        .WithMany()
+                        .HasForeignKey("AlbumId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Album");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/PiwigoDirectorySync/Migrations/20230911213151_AlbumPathIsUniqueWithinServer.cs b/PiwigoDirectorySync/Migrations/20230911213151_AlbumPathIsUniqueWithinServer.cs
new file mode 100644
index 0000000..5e9d00c
--- /dev/null
+++ b/PiwigoDirectorySync/Migrations/20230911213151_AlbumPathIsUniqueWithinServer.cs
@@ -0,0 +1,37 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace PiwigoDirectorySync.Migrations
+{
+    /// <inheritdoc />
+    public partial class AlbumPathIsUniqueWithinServer : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_PiwigoAlbums_ServerId_Path",
+                table: "PiwigoAlbums");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_PiwigoAlbums_ServerId_Path",
+                table: "PiwigoAlbums",
+                columns: new[] { "ServerId", "Path" },
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_PiwigoAlbums_ServerId_Path",
+                table: "PiwigoAlbums");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_PiwigoAlbums_ServerId_Path",
+                table: "PiwigoAlbums",
+                columns: new[] { "ServerId", "Path" });
+        }
+    }
+}
diff --git a/PiwigoDirectorySync/Migrations/20230911213415_ImagePathIsUniqueWithinAlbum.Designer.cs b/PiwigoDirectorySync/Migrations/20230911213415_ImagePathIsUniqueWithinAlbum.Designer.cs
new file mode 100644
index 0000000..94781ef
--- /dev/null
+++ b/PiwigoDirectorySync/Migrations/20230911213415_ImagePathIsUniqueWithinAlbum.Designer.cs
@@ -0,0 +1,160 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using PiwigoDirectorySync.Persistence;
+
+#nullable disable
+
+namespace PiwigoDirectorySync.Migrations
+{
+    [DbContext(typeof(PersistenceContext))]
+    [Migration("20230911213415_ImagePathIsUniqueWithinAlbum")]
+    partial class ImagePathIsUniqueWithinAlbum
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder.HasAnnotation("ProductVersion", "7.0.10");
+
+            modelBuilder.Entity("PiwigoDirectorySync.Persistence.AlbumEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("ParentId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Path")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("ServerAlbumId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ServerId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ParentId");
+
+                    b.HasIndex("ServerAlbumId");
+
+                    b.HasIndex("ServerId", "Path")
+                        .IsUnique();
+
+                    b.ToTable("PiwigoAlbums");
+                });
+
+            modelBuilder.Entity("PiwigoDirectorySync.Persistence.ImageEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("AlbumId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("DeleteRequired")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("FilePath")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("LastChange")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Md5Sum")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int?>("ServerImageId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("UploadRequired")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ServerImageId");
+
+                    b.HasIndex("AlbumId", "FilePath")
+                        .IsUnique();
+
+                    b.ToTable("PiwigoImages");
+                });
+
+            modelBuilder.Entity("PiwigoDirectorySync.Persistence.ServerEntity", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Password")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("RootDirectory")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Url")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Username")
+                        .IsRequired()
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Name")
+                        .IsUnique();
+
+                    b.ToTable("PiwigoServers");
+                });
+
+            modelBuilder.Entity("PiwigoDirectorySync.Persistence.AlbumEntity", b =>
+                {
+                    b.HasOne("PiwigoDirectorySync.Persistence.AlbumEntity", "Parent")
+                        .WithMany()
+                        .HasForeignKey("ParentId");
+
+                    b.HasOne("PiwigoDirectorySync.Persistence.ServerEntity", "Server")
+                        .WithMany()
+                        .HasForeignKey("ServerId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Parent");
+
+                    b.Navigation("Server");
+                });
+
+            modelBuilder.Entity("PiwigoDirectorySync.Persistence.ImageEntity", b =>
+                {
+                    b.HasOne("PiwigoDirectorySync.Persistence.AlbumEntity", "Album")
+                        .WithMany()
+                        .HasForeignKey("AlbumId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Album");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/PiwigoDirectorySync/Migrations/20230911213415_ImagePathIsUniqueWithinAlbum.cs b/PiwigoDirectorySync/Migrations/20230911213415_ImagePathIsUniqueWithinAlbum.cs
new file mode 100644
index 0000000..e6ec667
--- /dev/null
+++ b/PiwigoDirectorySync/Migrations/20230911213415_ImagePathIsUniqueWithinAlbum.cs
@@ -0,0 +1,37 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace PiwigoDirectorySync.Migrations
+{
+    /// <inheritdoc />
+    public partial class ImagePathIsUniqueWithinAlbum : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_PiwigoImages_AlbumId_FilePath",
+                table: "PiwigoImages");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_PiwigoImages_AlbumId_FilePath",
+                table: "PiwigoImages",
+                columns: new[] { "AlbumId", "FilePath" },
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_PiwigoImages_AlbumId_FilePath",
+                table: "PiwigoImages");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_PiwigoImages_AlbumId_FilePath",
+                table: "PiwigoImages",
+                columns: new[] { "AlbumId", "FilePath" });
+        }
+    }
+}
diff --git a/PiwigoDirectorySync/Migrations/PersistenceContextModelSnapshot.cs b/PiwigoDirectorySync/Migrations/PersistenceContextModelSnapshot.cs
index bb27dde..ea38758 100644
--- a/PiwigoDirectorySync/Migrations/PersistenceContextModelSnapshot.cs
+++ b/PiwigoDirectorySync/Migrations/PersistenceContextModelSnapshot.cs
@@ -46,7 +46,8 @@ namespace PiwigoDirectorySync.Migrations
 
                     b.HasIndex("ServerAlbumId");
 
-                    b.HasIndex("ServerId", "Path");
+                    b.HasIndex("ServerId", "Path")
+                        .IsUnique();
 
                     b.ToTable("PiwigoAlbums");
                 });
@@ -83,7 +84,8 @@ namespace PiwigoDirectorySync.Migrations
 
                     b.HasIndex("ServerImageId");
 
-                    b.HasIndex("AlbumId", "FilePath");
+                    b.HasIndex("AlbumId", "FilePath")
+                        .IsUnique();
 
                     b.ToTable("PiwigoImages");
                 });
diff --git a/PiwigoDirectorySync/Persistence/AlbumEntity.cs b/PiwigoDirectorySync/Persistence/AlbumEntity.cs
index 3c6fb2f..184e0d8 100644
--- a/PiwigoDirectorySync/Persistence/AlbumEntity.cs
+++ b/PiwigoDirectorySync/Persistence/AlbumEntity.cs
@@ -6,7 +6,7 @@ namespace PiwigoDirectorySync.Persistence;
 
 [Index(nameof(ParentId))]
 [Index(nameof(ServerAlbumId))]
-[Index(nameof(ServerId), nameof(Path))]
+[Index(nameof(ServerId), nameof(Path), IsUnique = true)]
 public class AlbumEntity
 {
     [Key]
diff --git a/PiwigoDirectorySync/Persistence/BloggingContextFactory.cs b/PiwigoDirectorySync/Persistence/BloggingContextFactory.cs
new file mode 100644
index 0000000..3e0b604
--- /dev/null
+++ b/PiwigoDirectorySync/Persistence/BloggingContextFactory.cs
@@ -0,0 +1,14 @@
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
+
+namespace PiwigoDirectorySync.Persistence;
+
+public class BloggingContextFactory : IDesignTimeDbContextFactory<PersistenceContext>
+{
+    public PersistenceContext CreateDbContext(string[] args)
+    {
+        var optionsBuilder = new DbContextOptionsBuilder<PersistenceContext>();
+        optionsBuilder.UseSqlite("Data Source=piwigoSync.db");
+        return new PersistenceContext(optionsBuilder.Options);
+    }
+}
\ No newline at end of file
diff --git a/PiwigoDirectorySync/Persistence/ImageEntity.cs b/PiwigoDirectorySync/Persistence/ImageEntity.cs
index 399745a..d2812f0 100644
--- a/PiwigoDirectorySync/Persistence/ImageEntity.cs
+++ b/PiwigoDirectorySync/Persistence/ImageEntity.cs
@@ -4,7 +4,7 @@ using Microsoft.EntityFrameworkCore;
 
 namespace PiwigoDirectorySync.Persistence;
 
-[Index(nameof(AlbumId), nameof(FilePath))]
+[Index(nameof(AlbumId), nameof(FilePath), IsUnique = true)]
 [Index(nameof(ServerImageId))]
 public class ImageEntity
 {