--- a/pkg/imports/dsr.go	Tue Sep 17 10:29:36 2019 +0200
+++ b/pkg/imports/dsr.go	Tue Sep 17 12:52:29 2019 +0200
@@ -17,6 +17,7 @@
 import (
 	"context"
 	"database/sql"
+	"errors"
 
 	"gemma.intevation.de/gemma/pkg/models"
 )
@@ -67,7 +68,19 @@
 	tx *sql.Tx,
 	id int64,
 ) error {
-	_, err := tx.ExecContext(ctx, dsrStageDoneSQL, id)
+	result, err := tx.ExecContext(ctx, dsrStageDoneSQL, id)
+	if err != nil {
+		return err
+	}
+	rows, err := result.RowsAffected()
+	if err != nil {
+		return err
+	}
+	if rows == 0 {
+		return errors.New("Deletion failed.  " +
+			"Propably Data outside the area of responsibility." +
+			"Or the data was already deleted by another user.")
+	}
 	return err
 }