Server error after removing column

[kimrutherford]

If I start with this query:

<query model="genomic" view="Gene.primaryIdentifier Gene.alleles.symbol" sortOrder="Gene.primaryIdentifier ASC">
   <constraint path="Gene" value="cdc12,cdc8" op="LOOKUP" code="A"/>
</query>

then "Show all 37 rows", then click the x to remove the "Gene DB identifier", I get an error:

Here's the XML from the "Show query" box:

<query model="genomic" view="Gene.alleles.symbol" sortOrder="Gene.primaryIdentifier ASC" name="Custom_Gene_Query_-1458248286">
   <constraint path="Gene" value="cdc12,cdc8" op="LOOKUP" code="A"/>
</query>

I can import that XML but I get an error when show the results.