Message in Spanish (Español)
MC6009: no se puede especificar el atributo <var>X</var>:ClassModifier en la etiqueta raíz porque se requiere también un atributo <var>X</var>:Class. Agregue un atributo <var>X</var>:Class o quite el atributo <var>X</var>:ClassModifier.
Unlocalized message
MC6009: <var>X</var>:ClassModifier attribute cannot be specified on the root tag because a <var>X</var>:Class attribute is also required. Either add a <var>X</var>:Class attribute or remove the <var>X</var>:ClassModifier attribute.
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