E2553 Class type constraint cannot be specified more than once (Object Pascal)

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This occurs when trying to specify the type constraint for the generic type more than once.


program E2553;

{$APPTYPE CONSOLE}

uses
  SysUtils;

type
  TBaseClass = class
  end;

  TNewClass = class(TBaseClass)
  end;

  TTestClass<TC: TBaseClass, TNewClass> = class //E2553

  end;
begin