Attch#2 Field Definition
Summarzing field followed by this screen
Remove the summary field (and any calculation fields that use it in a calculation) from the layout and you won't get this result. (and look out for tool tips, conditional formats, hide object when properties that can all have calculations that refer to such a field...)
In cases where you need the field to be on the layout, first reduce the found set to something much less than all records such as a found set of no records or just 1 record.