In my application I have an Entity Framework setup, with authentication using EF’s Identity. I’ve chosen to have the Id properties for all my entities set to type Guid.
When trying to apply migrations to the database to a Microsoft SqlServer from code I ran into the error below (applying the migration to Sqlite works without issues):

System.InvalidCastException: Unable to cast object of type 'System.Guid' to type 'System.String'.
         at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerStringTypeMapping.GenerateNonNullSqlLiteral(Object value)
         at Microsoft.EntityFrameworkCore.Storage.RelationalTypeMapping.GenerateProviderValueSqlLiteral(Object value)
         at Microsoft.EntityFrameworkCore.Update.UpdateSqlGenerator.AppendSqlLiteral(StringBuilder commandStringBuilder, IColumnModification modification, String tableName, String schema)
         at Microsoft.EntityFrameworkCore.Update.UpdateSqlGenerator.<>c.<AppendValues>b__24_0(StringBuilder sb, IColumnModification o, ValueTuple`3 p)
         at System.Text.StringBuilderExtensions.AppendJoin[T,TParam](StringBuilder stringBuilder, IEnumerable`1 values, TParam param, Action`3 joinAction, String separator)
         at Microsoft.EntityFrameworkCore.Update.UpdateSqlGenerator.AppendValues(StringBuilder commandStringBuilder, String name, String schema, IReadOnlyList`1 operations)
         at Microsoft.EntityFrameworkCore.SqlServer.Update.Internal.SqlServerUpdateSqlGenerator.AppendInsertMultipleRows(StringBuilder commandStringBuilder, IReadOnlyList`1 modificationCommands, List`1 writeOperations, Boolean& requiresTransaction)
         at Microsoft.EntityFrameworkCore.SqlServer.Update.Internal.SqlServerUpdateSqlGenerator.AppendBulkInsertOperation(StringBuilder commandStringBuilder, IReadOnlyList`1 modificationCommands, Int32 commandPosition, Boolean& requiresTransaction)
         at Microsoft.EntityFrameworkCore.SqlServer.Update.Internal.SqlServerModificationCommandBatch.ApplyPendingBulkInsertCommands()
         at Microsoft.EntityFrameworkCore.SqlServer.Update.Internal.SqlServerModificationCommandBatch.Complete(Boolean moreBatchesExpected)
         at Microsoft.EntityFrameworkCore.Update.Internal.CommandBatchPreparer.CreateCommandBatches(IEnumerable`1 commandSet, Boolean moreCommandSets, Boolean assertColumnModification, ParameterNameGenerator parameterNameGenerator)+MoveNext()
         at Microsoft.EntityFrameworkCore.Migrations.SqlServerMigrationsSqlGenerator.Generate(InsertDataOperation operation, IModel model, MigrationCommandListBuilder builder, Boolean terminate)
         at Microsoft.EntityFrameworkCore.Migrations.MigrationsSqlGenerator.<>c.<.cctor>b__82_28(MigrationsSqlGenerator g, MigrationOperation o, IModel m, MigrationCommandListBuilder b)
         at Microsoft.EntityFrameworkCore.Migrations.MigrationsSqlGenerator.Generate(MigrationOperation operation, IModel model, MigrationCommandListBuilder builder)
         at Microsoft.EntityFrameworkCore.Migrations.SqlServerMigrationsSqlGenerator.Generate(MigrationOperation operation, IModel model, MigrationCommandListBuilder builder)
         at Microsoft.EntityFrameworkCore.Migrations.MigrationsSqlGenerator.Generate(IReadOnlyList`1 operations, IModel model, MigrationsSqlGenerationOptions options)
         at Microsoft.EntityFrameworkCore.Migrations.SqlServerMigrationsSqlGenerator.Generate(IReadOnlyList`1 operations, IModel model, MigrationsSqlGenerationOptions options)
         at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.GenerateUpSql(Migration migration, MigrationsSqlGenerationOptions options)
         at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.<>c__DisplayClass16_2.<GetMigrationCommandLists>b__2()
         at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.MigrateAsync(String targetMigration, CancellationToken cancellationToken)
         at RonBv.GameSite.Api.Data.DatabaseMigrator.ApplyMigrations(WebApplication app) in D:a1s...DataDatabaseMigrator.cs:line 25

This seems to indicate that during the ‘Up’ process, the conversion error occurs on my migration, but I can’t seem to figure out what the exact cause for this is.

Line 25 of the DatabaseMigrator class is the following:

await dbContext.Database.MigrateAsync(cancellationTokenSource.Token);

The only migration I have is the one below:

namespace RonBv.GameSite.Api.Data.Migrations
{
    /// <inheritdoc />
    public partial class Initial : Migration
    {
        /// <inheritdoc />
        protected override void Up(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.CreateTable(
                name: "AspNetRoles",
                columns: table => new
                {
                    Id = table.Column<Guid>(type: "TEXT", nullable: false),
                    Name = table.Column<string>(type: "TEXT", maxLength: 256, nullable: true),
                    NormalizedName = table.Column<string>(type: "TEXT", maxLength: 256, nullable: true),
                    ConcurrencyStamp = table.Column<string>(type: "TEXT", nullable: true)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_AspNetRoles", x => x.Id);
                });

            migrationBuilder.CreateTable(
                name: "AspNetUsers",
                columns: table => new
                {
                    Id = table.Column<Guid>(type: "TEXT", nullable: false),
                    UserName = table.Column<string>(type: "TEXT", maxLength: 256, nullable: true),
                    NormalizedUserName = table.Column<string>(type: "TEXT", maxLength: 256, nullable: true),
                    Email = table.Column<string>(type: "TEXT", maxLength: 256, nullable: true),
                    NormalizedEmail = table.Column<string>(type: "TEXT", maxLength: 256, nullable: true),
                    EmailConfirmed = table.Column<bool>(type: "INTEGER", nullable: false),
                    PasswordHash = table.Column<string>(type: "TEXT", nullable: true),
                    SecurityStamp = table.Column<string>(type: "TEXT", nullable: true),
                    ConcurrencyStamp = table.Column<string>(type: "TEXT", nullable: true),
                    PhoneNumber = table.Column<string>(type: "TEXT", nullable: true),
                    PhoneNumberConfirmed = table.Column<bool>(type: "INTEGER", nullable: false),
                    TwoFactorEnabled = table.Column<bool>(type: "INTEGER", nullable: false),
                    LockoutEnd = table.Column<DateTimeOffset>(type: "TEXT", nullable: true),
                    LockoutEnabled = table.Column<bool>(type: "INTEGER", nullable: false),
                    AccessFailedCount = table.Column<int>(type: "INTEGER", nullable: false)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_AspNetUsers", x => x.Id);
                });

            migrationBuilder.CreateTable(
                name: "AspNetRoleClaims",
                columns: table => new
                {
                    Id = table.Column<int>(type: "INTEGER", nullable: false)
                        .Annotation("Sqlite:Autoincrement", true),
                    RoleId = table.Column<Guid>(type: "TEXT", nullable: false),
                    ClaimType = table.Column<string>(type: "TEXT", nullable: true),
                    ClaimValue = table.Column<string>(type: "TEXT", nullable: true)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_AspNetRoleClaims", x => x.Id);
                    table.ForeignKey(
                        name: "FK_AspNetRoleClaims_AspNetRoles_RoleId",
                        column: x => x.RoleId,
                        principalTable: "AspNetRoles",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Cascade);
                });

            migrationBuilder.CreateTable(
                name: "AspNetUserClaims",
                columns: table => new
                {
                    Id = table.Column<int>(type: "INTEGER", nullable: false)
                        .Annotation("Sqlite:Autoincrement", true),
                    UserId = table.Column<Guid>(type: "TEXT", nullable: false),
                    ClaimType = table.Column<string>(type: "TEXT", nullable: true),
                    ClaimValue = table.Column<string>(type: "TEXT", nullable: true)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_AspNetUserClaims", x => x.Id);
                    table.ForeignKey(
                        name: "FK_AspNetUserClaims_AspNetUsers_UserId",
                        column: x => x.UserId,
                        principalTable: "AspNetUsers",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Cascade);
                });

            migrationBuilder.CreateTable(
                name: "AspNetUserLogins",
                columns: table => new
                {
                    LoginProvider = table.Column<string>(type: "TEXT", nullable: false),
                    ProviderKey = table.Column<string>(type: "TEXT", nullable: false),
                    ProviderDisplayName = table.Column<string>(type: "TEXT", nullable: true),
                    UserId = table.Column<Guid>(type: "TEXT", nullable: false)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_AspNetUserLogins", x => new { x.LoginProvider, x.ProviderKey });
                    table.ForeignKey(
                        name: "FK_AspNetUserLogins_AspNetUsers_UserId",
                        column: x => x.UserId,
                        principalTable: "AspNetUsers",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Cascade);
                });

            migrationBuilder.CreateTable(
                name: "AspNetUserRoles",
                columns: table => new
                {
                    UserId = table.Column<Guid>(type: "TEXT", nullable: false),
                    RoleId = table.Column<Guid>(type: "TEXT", nullable: false)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_AspNetUserRoles", x => new { x.UserId, x.RoleId });
                    table.ForeignKey(
                        name: "FK_AspNetUserRoles_AspNetRoles_RoleId",
                        column: x => x.RoleId,
                        principalTable: "AspNetRoles",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Cascade);
                    table.ForeignKey(
                        name: "FK_AspNetUserRoles_AspNetUsers_UserId",
                        column: x => x.UserId,
                        principalTable: "AspNetUsers",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Cascade);
                });

            migrationBuilder.CreateTable(
                name: "AspNetUserTokens",
                columns: table => new
                {
                    UserId = table.Column<Guid>(type: "TEXT", nullable: false),
                    LoginProvider = table.Column<string>(type: "TEXT", nullable: false),
                    Name = table.Column<string>(type: "TEXT", nullable: false),
                    Value = table.Column<string>(type: "TEXT", nullable: true)
                },
                constraints: table =>
                {
                    table.PrimaryKey("PK_AspNetUserTokens", x => new { x.UserId, x.LoginProvider, x.Name });
                    table.ForeignKey(
                        name: "FK_AspNetUserTokens_AspNetUsers_UserId",
                        column: x => x.UserId,
                        principalTable: "AspNetUsers",
                        principalColumn: "Id",
                        onDelete: ReferentialAction.Cascade);
                });

            migrationBuilder.InsertData(
                table: "AspNetRoles",
                columns: new[] { "Id", "ConcurrencyStamp", "Name", "NormalizedName" },
                values: new object[,]
                {
                    { new Guid("501519c5-07b5-4e31-8d18-70ec8eb83010"), null, "User", "USER" },
                    { new Guid("91fb18b3-c4ca-4d05-8ff9-bbadd558475a"), null, "Administrator", "ADMINISTRATOR" }
                });

            migrationBuilder.InsertData(
                table: "AspNetUsers",
                columns: new[] { "Id", "AccessFailedCount", "ConcurrencyStamp", "Email", "EmailConfirmed", "LockoutEnabled", "LockoutEnd", "NormalizedEmail", "NormalizedUserName", "PasswordHash", "PhoneNumber", "PhoneNumberConfirmed", "SecurityStamp", "TwoFactorEnabled", "UserName" },
                values: new object[] { new Guid("ce64e55b-0cd4-4ffa-a72c-226e6859188d"), 0, "25bdd728-f300-468f-8733-41fa7ab384f6", "[email protected]", true, false, null, "[email protected]", "ADMINISTRATOR", "...", null, false, "", false, "Administrator" });

            migrationBuilder.InsertData(
                table: "AspNetUserRoles",
                columns: new[] { "RoleId", "UserId" },
                values: new object[] { new Guid("91fb18b3-c4ca-4d05-8ff9-bbadd558475a"), new Guid("ce64e55b-0cd4-4ffa-a72c-226e6859188d") });

            migrationBuilder.CreateIndex(
                name: "IX_AspNetRoleClaims_RoleId",
                table: "AspNetRoleClaims",
                column: "RoleId");

            migrationBuilder.CreateIndex(
                name: "RoleNameIndex",
                table: "AspNetRoles",
                column: "NormalizedName",
                unique: true);

            migrationBuilder.CreateIndex(
                name: "IX_AspNetUserClaims_UserId",
                table: "AspNetUserClaims",
                column: "UserId");

            migrationBuilder.CreateIndex(
                name: "IX_AspNetUserLogins_UserId",
                table: "AspNetUserLogins",
                column: "UserId");

            migrationBuilder.CreateIndex(
                name: "IX_AspNetUserRoles_RoleId",
                table: "AspNetUserRoles",
                column: "RoleId");

            migrationBuilder.CreateIndex(
                name: "EmailIndex",
                table: "AspNetUsers",
                column: "NormalizedEmail");

            migrationBuilder.CreateIndex(
                name: "UserNameIndex",
                table: "AspNetUsers",
                column: "NormalizedUserName",
                unique: true);
        }

        /// <inheritdoc />
        protected override void Down(MigrationBuilder migrationBuilder)
        {
            migrationBuilder.DropTable(
                name: "AspNetRoleClaims");

            migrationBuilder.DropTable(
                name: "AspNetUserClaims");

            migrationBuilder.DropTable(
                name: "AspNetUserLogins");

            migrationBuilder.DropTable(
                name: "AspNetUserRoles");

            migrationBuilder.DropTable(
                name: "AspNetUserTokens");

            migrationBuilder.DropTable(
                name: "AspNetRoles");

            migrationBuilder.DropTable(
                name: "AspNetUsers");
        }
    }
}

I’m really hoping anybody could shed some light on why this problem occurred and what I can do to prevent it in the future.