diff --git a/src/BuildingBlocks/BuildingBlocks.csproj b/src/BuildingBlocks/BuildingBlocks.csproj
index 3f4f0244..8595b07a 100644
--- a/src/BuildingBlocks/BuildingBlocks.csproj
+++ b/src/BuildingBlocks/BuildingBlocks.csproj
@@ -33,10 +33,6 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="7.0.2" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="7.0.2">
-      <PrivateAssets>all</PrivateAssets>
-      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
-    </PackageReference>
     <PackageReference Include="Microsoft.Extensions.DependencyModel" Version="7.0.0" />
     <PackageReference Include="Mongo2Go" Version="3.1.3" />
     <PackageReference Include="Npgsql" Version="7.0.1" />
diff --git a/src/Services/Flight/src/Flight/Data/Configurations/AirportConfiguration.cs b/src/Services/Flight/src/Flight/Data/Configurations/AirportConfiguration.cs
index 2111c3be..6570a2dd 100644
--- a/src/Services/Flight/src/Flight/Data/Configurations/AirportConfiguration.cs
+++ b/src/Services/Flight/src/Flight/Data/Configurations/AirportConfiguration.cs
@@ -17,7 +17,7 @@ public void Configure(EntityTypeBuilder<Airport> builder)
         builder.HasKey(r => r.Id);
         builder.Property(r => r.Id).ValueGeneratedNever()
             .HasConversion<Guid>(airportId => airportId.Value, dbId => AirportId.Of(dbId));
-
+        // // ref: https://learn.microsoft.com/en-us/ef/core/saving/concurrency?tabs=fluent-api
         builder.Property(r => r.Version).IsConcurrencyToken();
 
 
diff --git a/src/Services/Flight/src/Flight/Flights/Models/Flight.cs b/src/Services/Flight/src/Flight/Flights/Models/Flight.cs
index b246d304..fc788157 100644
--- a/src/Services/Flight/src/Flight/Flights/Models/Flight.cs
+++ b/src/Services/Flight/src/Flight/Flights/Models/Flight.cs
@@ -1,4 +1,3 @@
-using System;
 using BuildingBlocks.Core.Model;
 
 namespace Flight.Flights.Models;
@@ -8,7 +7,6 @@ namespace Flight.Flights.Models;
 using Features.CreatingFlight.V1;
 using Features.DeletingFlight.V1;
 using Features.UpdatingFlight.V1;
-using global::Flight.Flights.Exceptions;
 using global::Flight.Flights.ValueObjects;
 
 public record Flight : Aggregate<FlightId>
@@ -29,8 +27,6 @@ public static Flight Create(FlightId id, FlightNumber flightNumber, AircraftId a
         AirportId arriveAirportId, DurationMinutes durationMinutes, FlightDate flightDate, Enums.FlightStatus status,
         Price price, bool isDeleted = false)
     {
-        //SimpleFlightValidate(departureDate.Value, arriveDate.Value, flightDate.Value);
-
         var flight = new Flight
         {
             Id = id,
@@ -103,27 +99,4 @@ public void Delete(FlightId id, FlightNumber flightNumber, AircraftId aircraftId
 
         AddDomainEvent(@event);
     }
-
-    public static void SimpleFlightValidate(DateTime departureDate, DateTime arriveDate, DateTime flightDate)
-    {
-        if (departureDate >= arriveDate)
-        {
-            throw new FlightExceptions(departureDate, arriveDate);
-        }
-
-        if (flightDate < departureDate || flightDate > arriveDate)
-        {
-            throw new FlightExceptions(flightDate);
-        }
-    }
-
-    public static TimeSpan GetFlightDuration(DateTime departureDate, DateTime arriveDate)
-    {
-        return arriveDate - departureDate;
-    }
-
-    public static bool IsOnSameDay(DateTime departureDate, DateTime arriveDate)
-    {
-        return departureDate.Date == arriveDate.Date;
-    }
 }