APPLICATION ERROR #11 A necessary field "Summary" was empty.

[gmlst2015]

IN THE ISSUES VIEW PAGE ,
EDIT THE ISSUES,THEN SUBMIT IT . I GET THIS ERROR "APPLICATION ERROR #11 A necessary field "Summary" was empty."
THE Summary COLUMN IS NOT NULL

[atrol]

Also treated at https://www.mantisbt.org/bugs/view.php?id=19998