1802: Solve console error about controlled element

Author: Ruben van Leeuwen

frontend/packages/pydantic-forms/src/components/fields/IntegerField.tsx

@@ -19,7 +19,7 @@ export const IntegerField = ({
             }}
             disabled={disabled}
             // Value will be an object when it is added by an array field. We do this be able to add more than one empty field
-            value={_.isObject(value) ? undefined : value}
+            value={_.isObject(value) ? '' : value}
             type="number"
             style={{
                 padding: '8px',