❔ Ef core creating shadow foreign key, why?

The foreign key property 'LessonPhase.LessonId1' was created in shadow state because a conflicting property with the simple name 'LessonId' exists in the entity type, but is either not mapped, is already used for another relationship, or is incompatible with the associated primary key type

public class LessonPhase : Entity<Guid>, ISoftDelete
{
    public required int PhaseNumber { get; init; }
    public int NumberOfExplanationRequestsMade { get; set; }
    public Lesson Lesson { get; init; }
    public Guid LessonId { get; init; }
    public bool IsDeleted { get; set; }

public class Lesson : FullAuditedAggregateRootWithUser<Guid, IdentityUser>
{
    public required string LessonSrcLanguage { get; init; }
    public required string LessonDstLanguage { get; init; }
    public int LessonNumber { get; set; }
    public int LessonDifficulty { get; init; }
    public required LessonState LessonState { get; set; }
    public ICollection<LessonPhase> Phases { get; set; }
    public LessonPhase CurrentPhase { get; set; }

    public Lesson()
    {
        Phases = new Collection<LessonPhase>();
    }
}

  builder.Entity<Lesson>(b =>
        {
            b.ToTable(lingumindConsts.DbTablePrefix + "Lessons", lingumindConsts.DbSchema);
            b.ConfigureByConvention(); //auto configure for the base class props
        });

        builder.Entity<LessonPhase>(b =>
        {
            b.ToTable(lingumindConsts.DbTablePrefix + "Phases", lingumindConsts.DbSchema);
            b.HasOne(x => x.Lesson).WithMany(x => x.Phases).HasForeignKey(x => x.LessonId);