Syntax Error in originals-chess-knight.svg

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There’s a syntax error in dist/svg/game/originals-chess-knight.svg:

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M0 0h512v512H0z"/>id=&quot;defs4976&quot; /&gt;<path d="M60.81 476.91h300v-60h-300v60zm233.79-347.3l13.94 7.39c31.88-43.62 61.34-31.85 61.34-31.85l-21.62 53 35.64 19 2.87 33 64.42 108.75-43.55 29.37s-26.82-36.39-39.65-43.66c-10.66-6-41.22-10.25-56.17-12l-67.54-76.91-12 10.56 37.15 42.31c-.13.18-.25.37-.38.57-35.78 58.17 23 105.69 68.49 131.78H84.14C93 85 294.6 129.61 294.6 129.61z" fill="#fff"/></svg>

Please note the id="defs4976" />.