diff --git a/pkg/kn/commands/service/configuration_edit_flags.go b/pkg/kn/commands/service/configuration_edit_flags.go
index 144939a4d8..31fbb0e248 100644
--- a/pkg/kn/commands/service/configuration_edit_flags.go
+++ b/pkg/kn/commands/service/configuration_edit_flags.go
@@ -334,7 +334,15 @@ func (p *ConfigurationEditFlags) Apply(
 		} else if cmd.Flags().Changed("scale-min") {
 			return fmt.Errorf("only --scale or --scale-min can be specified")
 		} else {
-			p.ScaleConversion(template, p.Scale)
+			scaleMin, scaleMax, err := p.ScaleConversion(p.Scale)
+			err = servinglib.UpdateMaxScale(template, scaleMax)
+			if err != nil {
+				return err
+			}
+			err = servinglib.UpdateMinScale(template, scaleMin)
+			if err != nil {
+				return err
+			}
 		}
 	}
 
@@ -475,43 +483,27 @@ func (p *ConfigurationEditFlags) AnyMutation(cmd *cobra.Command) bool {
 	return false
 }
 
-func (p *ConfigurationEditFlags) ScaleConversion(template *servingv1.RevisionTemplateSpec, scale string) {
-	var scaleMin, scaleMax int
-	var err error
-
+func (p *ConfigurationEditFlags) ScaleConversion(scale string) (scaleMin int, scaleMax int, err error) {
 	if !strings.Contains(scale, "..") {
-		scaleMin, err := strconv.Atoi(scale)
+		scaleMin, err = strconv.Atoi(scale)
 		if err != nil {
-			fmt.Printf("%v", err)
+			return 0, 0, err
 		}
 		scaleMax = scaleMin
 	} else {
 		scaleParts := strings.Split(scale, "..")
-
-		scaleMin, _ = strconv.Atoi(scaleParts[0])
-		if err != nil {
-			fmt.Printf("%d %v", scaleMin, err)
-		}
-		scaleMax, _ = strconv.Atoi(scaleParts[1])
-		if err != nil {
-			fmt.Printf("%d %v", scaleMax, err)
-		}
-		fmt.Printf("%d %d", scaleMax, scaleMin)
-
-	}
-	fmt.Printf("max = %d, min=%d", scaleMax, scaleMin)
-	if scaleMax > 0 {
-		err = servinglib.UpdateMaxScale(template, scaleMax)
-		fmt.Printf("Updating scaleMax %d", scaleMax)
-		if err != nil {
-			fmt.Printf("%d %v", scaleMax, err)
+		if scaleParts[0] != "" {
+			scaleMin, err = strconv.Atoi(scaleParts[0])
+			if err != nil {
+				return 0, 0, err
+			}
 		}
-	}
-	if scaleMin > 0 {
-		err = servinglib.UpdateMinScale(template, scaleMin)
-		fmt.Printf("Updating scaleMin %d", scaleMin)
-		if err != nil {
-			fmt.Printf("%d %v", scaleMin, err)
+		if scaleParts[1] != "" {
+			scaleMax, err = strconv.Atoi(scaleParts[1])
+			if err != nil {
+				return 0, 0, err
+			}
 		}
 	}
+	return scaleMin, scaleMax, err
 }