Error Number:547,State:0,Class:16 при попытке обновить базу данных

Всем привет. При попытке обновить базу данных вылезает эта ошибка:

Error Number:547,State:0,Class:16 The ALTER TABLE statement conflicted with the FOREIGN KEY constraint "FK_Product_ApplicationType_ApplicationId". The conflict occurred in database "Rocky", table "dbo.ApplicationType", column 'Id'. PM>

Что делать?

20220828104535_AddApplicationTypeToProduct.cs

using Microsoft.EntityFrameworkCore.Migrations;

namespace Rocky.Migrations
{
    public partial class AddApplicationTypeToProduct : Migration
    {
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.AddColumn<int>(
                name: "ApplicationId",
                table: "Product",
                type: "int",
                nullable: false,
                defaultValue: 0);

            migrationBuilder.CreateIndex(
                name: "IX_Product_ApplicationId",
                table: "Product",
                column: "ApplicationId");

            migrationBuilder.AddForeignKey(
                name: "FK_Product_ApplicationType_ApplicationId",
                table: "Product",
                column: "ApplicationId",
                principalTable: "ApplicationType",
                principalColumn: "Id",
                onDelete: ReferentialAction.Cascade);
        }

        protected override void Down(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.DropForeignKey(
                name: "FK_Product_ApplicationType_ApplicationId",
                table: "Product");

            migrationBuilder.DropIndex(
                name: "IX_Product_ApplicationId",
                table: "Product");

            migrationBuilder.DropColumn(
                name: "ApplicationId",
                table: "Product");
        }
    }
}

Модель applicationtype.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;

namespace Rocky.Models
{
    public class ApplicationType
    {
        [Key]
        public int Id { get; set; }
        [Required]
        public string Name { get; set; }

    }
}