fix translations

@@ -486,7 +486,7 @@
                                                                                                                 <label translate>extension.value</label>
                                                                                                                 <input required name="opcTimeseriesValue_{{serverIndex}}{{mapIndex}}{{timeseriesIndex}}" ng-model="timeseries.value">
                                                                                                                 <div ng-messages="theForm['opcTimeseriesValue_' + serverIndex + mapIndex + timeseriesIndex].$error">
-                                                                                                                    <div translate ng-message="required">extension.required-value</div>
+                                                                                                                    <div translate ng-message="required">extension.field-required</div>
                                                                                                                 </div>
                                                                                                             </md-input-container>
                                                                                                         </section>