Repairing broken blueprint: "The variable ... has an invalid type Map of Integers to Structures"

Development Programming & Scripting Blueprint
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What also works in newer versions, if you can’t find the variable to delete it and reloading the asset doesn’t prompt you to remove it:

  1. Add “UnrealEd” to your private dependencies, so you can include “Kismet2/BlueprintEditorUtils.h”

  2. Make a function that can use FBlueprinteditorUtils::RemoveMemberVariable, with the parameters being the blueprint, and the exact name of the variable as shown in the editor window, including spaces.

  3. Call this function in the editor, for example by using a BlueprintEditorUtility

Had to do this recently to clear out a variable that wasn’t showing up in the editor when I was many edits deep into a commit that I didn’t want to revert.