EF Core creates duplicate foreign key

Question

I'm using EF Core 6 and MS SQL Server. EF Core creates a redundant foreign key in my case.

There are my entities:

public class CashFlow : EntityInfo
{
    public CompanyOverview CompanyOverview { get; set; }
    public List<CashFlowReport> AnnualReports { get; set; }
    public List<CashFlowReport> QuarterlyReports { get; set; }
}

public class CashFlowReport : Report
{
    // Many string properties
}

And base class Report:

public abstract class Report 
{
    [Key]
    public int Id { get; set; }
    public string Symbol { get; set; }
    public string FiscalDateEnding { get; set; }
    public string ReportedCurrency { get; set; }
}

I've tried to configure it like this:

public override void Configure(EntityTypeBuilder<BalanceSheet> modelBuilder)
{
    base.Configure(modelBuilder);
    modelBuilder.HasMany(x => x.AnnualReports)
        .WithOne()
        .HasForeignKey(x => x.Symbol);
    modelBuilder.HasMany(x => x.QuarterlyReports)
        .WithOne()
        .HasForeignKey(x => x.Symbol);
}

But EF Core created two foreign keys in BalanceSheetReport table:

BalanceSheetSymbol                     nvarchar(450)
    constraint FK_BalanceSheetReport_balance_sheet_BalanceSheetSymbol
        references u1598429_u1598429.balance_sheet,
Symbol                                 nvarchar(450)
    constraint FK_BalanceSheetReport_balance_sheet_Symbol
        references u1598429_u1598429.balance_sheet,

What do I need to do to remove FK_BalanceSheetReport_balance_sheet_BalanceSheetSymbol?