added the pattern ^(?!^[-+.]*$)[+-]?0*\d*\.?\d*$ to the request property damages/anyOf[subschema #1]/items/minimumAmount/anyOf[subschema #2]
^(?!^[-+.]*$)[+-]?0*\d*\.?\d*$
damages/anyOf[subschema #1]/items/minimumAmount/anyOf[subschema #2]