Column appears in Query "Expr1012"

Q

Qwelldrin

What is this, It is not in my design view and I cannot remove it from view
when Opened. It contains no data and is not refrenced in anyway in the query
design?
This has appeared after I added a couple more columns in the Design, the
data select query is very simple and only provides data from the main table
via a Parameter entry box to filter the results.
Any information on what this is would be appreciated thanks.
 
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