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java.lang.NullPointerException: null	at com.datastax.driver.core.DataType.deserialize(DataType.java:673)	at com.datastax.driver.core.AbstractData.hashCode(AbstractData.java:457)	at com.datastax.driver.core.UDTValue.hashCode(UDTValue.java:69)	at java.util.HashMap.hash(HashMap.java:338)	at java.util.HashMap.put(HashMap.java:611)	at java.util.HashSet.add(HashSet.java:219)	at com.datastax.driver.core.TypeCodec$SetCodec.deserialize(TypeCodec.java:1076)	at com.datastax.driver.core.TypeCodec$SetCodec.deserialize(TypeCodec.java:1001)	at com.datastax.driver.core.AbstractGettableByIndexData.getSet(AbstractGettableByIndexData.java:343)	at com.datastax.driver.core.AbstractGettableData.getSet(AbstractGettableData.java:26)	at org.sfm.datastax.impl.getter.DatastaxSetWithConverterGetter.get(DatastaxSetWithConverterGetter.java:24)	at org.sfm.datastax.impl.getter.DatastaxSetWithConverterGetter.get(DatastaxSetWithConverterGetter.java:10)	at org.sfm.map.impl.fieldmapper.FieldMapperImpl.mapTo(FieldMapperImpl.java:23)