AddFixedPriceItem api throwing variation specifics errors-21916664 and 21916639

Please make sure you are passing only one set of VariationSpecificName and VariationSpecificPictureSet in the Pictures container. If there are more than one set of VariationSpecificName and VariationSpecificPictureSet in <Pictures> conatiner, you may get the variation specific errors -21916664 and 21916639

For example :
Here is the VariationSpecificsSet you are passing in <Variations> conatiner :

<Variations>
<VariationSpecificsSet>
<NameValueList>
<Name>Colour</Name>
<Value>Yellow</Value>
<Value>White</Value>
<Value>Black</Value>
<Value>Red</Value>
</NameValueList>
<NameValueList>
<Name>Strap and Face</Name>
<Value>Yellow - Matching</Value>
<Value>Yellow - Silver</Value>
<Value>Black - Matching</Value>
<Value>Red - Matching</Value>
<Value>White - Matching</Value>
</NameValueList>
</VariationSpecificsSet>
...
...
...

<Pictures>
<VariationSpecificName>Strap and Face</VariationSpecificName>
<VariationSpecificPictureSet>
<VariationSpecificValue>Yellow - Silver</VariationSpecificValue>
<PictureURL>some picture url</PictureURL>
</VariationSpecificPictureSet>
<VariationSpecificPictureSet>
<VariationSpecificValue>Yellow - Matching</VariationSpecificValue>
<PictureURL>some picture url</PictureURL>
</VariationSpecificPictureSet>
<VariationSpecificPictureSet>
<VariationSpecificValue>White - Matching</VariationSpecificValue>
<PictureURL>some picture url</PictureURL>
</VariationSpecificPictureSet>

<VariationSpecificName>Colour</VariationSpecificName>
<VariationSpecificPictureSet>
<VariationSpecificValue>Yellow</VariationSpecificValue>
<PictureURL>some picture url</PictureURL>
</VariationSpecificPictureSet>
<VariationSpecificPictureSet>
<VariationSpecificValue>Black</VariationSpecificValue>
<PictureURL>some picture url</PictureURL>
</VariationSpecificPictureSet>
</Pictures>
</Variations>



The Pictures container can only have pictures for one attribute , i.e. either for Color or 'Strap and Face'. Once you remove the second set of VariationSpecificName and VariationSpecificPictureSet
For example : If you remove :
<VariationSpecificName>Colour</VariationSpecificName>
<VariationSpecificPictureSet>
<VariationSpecificValue>Yellow</VariationSpecificValue>
<PictureURL>some picture url</PictureURL>
</VariationSpecificPictureSet>
<VariationSpecificPictureSet>
<VariationSpecificValue>Black</VariationSpecificValue>
<PictureURL>some picture url</PictureURL>
</VariationSpecificPictureSet>

you will no longer get these errors.