Got most of admin panel working. Data issues fixed

OpenArchival.DataAccess/Migrations/20250829182730_fixedduplicateprop.cs

@@ -0,0 +1,48 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace OpenArchival.DataAccess.Migrations
+{
+    /// <inheritdoc />
+    public partial class fixedduplicateprop : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_ArtifactEntries_ArtifactGroupings_ParentArtifactGroupingId",
+                table: "ArtifactEntries");
+
+            migrationBuilder.DropIndex(
+                name: "IX_ArtifactEntries_ParentArtifactGroupingId",
+                table: "ArtifactEntries");
+
+            migrationBuilder.DropColumn(
+                name: "ParentArtifactGroupingId",
+                table: "ArtifactEntries");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "ParentArtifactGroupingId",
+                table: "ArtifactEntries",
+                type: "integer",
+                nullable: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ArtifactEntries_ParentArtifactGroupingId",
+                table: "ArtifactEntries",
+                column: "ParentArtifactGroupingId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ArtifactEntries_ArtifactGroupings_ParentArtifactGroupingId",
+                table: "ArtifactEntries",
+                column: "ParentArtifactGroupingId",
+                principalTable: "ArtifactGroupings",
+                principalColumn: "Id");
+        }
+    }
+}