Message in Spanish (Español)
La multiplicidad no es válida en Role '<var>X</var>' de la relación '<var>Y</var>'. Dado que todas las propiedades de Dependent Role aceptan valores NULL, la multiplicidad de Principal Role debe ser '0..1'.
Unlocalized message
Multiplicity is not valid in Role '<var>X</var>' in relationship '<var>Y</var>'. Because all the properties in the Dependent Role are nullable, multiplicity of the Principal Role must be '0..1'.
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