diff --git a/storage/remote/otlptranslator/prometheusremotewrite/number_data_points.go b/storage/remote/otlptranslator/prometheusremotewrite/number_data_points.go
index 65d4fd70b2..e681bb352b 100644
--- a/storage/remote/otlptranslator/prometheusremotewrite/number_data_points.go
+++ b/storage/remote/otlptranslator/prometheusremotewrite/number_data_points.go
@@ -86,7 +86,7 @@ func (c *PrometheusConverter) addSumNumberDataPoints(ctx context.Context, dataPo
 			meta.MetricFamilyName,
 		)
 		if err != nil {
-			return nil
+			return err
 		}
 		var val float64
 		switch pt.ValueType() {