I've actually tried setting each property to the same name in the data type pre-values to attempt to get this ysod but i can't because the value is stored as xml like: anotherMediaPickeranotherMediaPickeranotherMediaPickertrue I've tried another test which is to add the SEO Checker data type to a content item, i do not get this error either.

I've clicked on every SEO checker thing i can find in the back office after it's been installed. Lastly, I cannot replicate this error since I don't know where it's coming from. I'm very surprised that this exception never showed up for SEO Checker.Įven if pre-values are an array, there is zero guarantee that there are not duplicate values in there and we we're not filtering them to be distinct anyways, so This change is required because we would have got other YSODs since pre-values are either an array or a dictionary, if you use the property PreValuesAsArray and it is a dictionary you will get a ysod. The only change we made previously that I can see is the change to DataTypeService.GetPreValuesByDataTypeId(int id) in rev: Which is called by another SEO checker class: SEOCheckerPropertyWrapper.

This error is coming from their library: PreValueCollectionExtensions, ) you should definitely be ensuring he's not adding duplicate keys to your dictionary in that extension method. We must've broken something that used to work on 7.1.1, see screenshot for more details

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