diff --git a/api/v1alpha1/nats_types.go b/api/v1alpha1/nats_types.go
index ddaa88e2..0933e9b4 100644
--- a/api/v1alpha1/nats_types.go
+++ b/api/v1alpha1/nats_types.go
@@ -125,7 +125,7 @@ type Cluster struct {
 	// +kubebuilder:default:=3
 	// +kubebuilder:validation:Minimum:=1
 	// +kubebuilder:validation:XValidation:rule="(self%2) != 0", message="size only accepts odd numbers"
-	// +kubebuilder:validation:XValidation:rule="!(oldSelf > 1 && self == 1)", message="size cannot be reduced to 1 once it was >1"
+	// +kubebuilder:validation:XValidation:rule="!(oldSelf > 1 && self == 1)", message="cannot be set to 1 if size was greater than 1"
 	Size int `json:"size,omitempty"`
 }
 
diff --git a/config/crd/bases/operator.kyma-project.io_nats.yaml b/config/crd/bases/operator.kyma-project.io_nats.yaml
index b62126ac..dc54fabb 100644
--- a/config/crd/bases/operator.kyma-project.io_nats.yaml
+++ b/config/crd/bases/operator.kyma-project.io_nats.yaml
@@ -83,7 +83,7 @@ spec:
                     x-kubernetes-validations:
                     - message: size only accepts odd numbers
                       rule: (self%2) != 0
-                    - message: size cannot be reduced to 1 once it was >1
+                    - message: cannot be set to 1 if size was greater than 1
                       rule: '!(oldSelf > 1 && self == 1)'
                 type: object
               jetStream:
diff --git a/internal/controller/nats/integrationtests/validation/integration_test.go b/internal/controller/nats/integrationtests/validation/integration_test.go
index 6a016fe2..1410a852 100644
--- a/internal/controller/nats/integrationtests/validation/integration_test.go
+++ b/internal/controller/nats/integrationtests/validation/integration_test.go
@@ -280,7 +280,7 @@ func Test_Validate_UpdateNATS(t *testing.T) {
 					Size: 1,
 				}),
 			},
-			wantErrMsg: "size cannot be reduced to 1 once it was >1",
+			wantErrMsg: "cannot be set to 1 if size was greater than 1",
 		},
 		{
 			name: `validation of cluster passes, if cluster.size was set to a value >1