diff --git a/pkg/apis/acme/v1alpha2/types_challenge.go b/pkg/apis/acme/v1alpha2/types_challenge.go
index 815db97bc..3de1d3dab 100644
--- a/pkg/apis/acme/v1alpha2/types_challenge.go
+++ b/pkg/apis/acme/v1alpha2/types_challenge.go
@@ -80,9 +80,6 @@ type ChallengeSpec struct {
 
 	// Solver contains the domain solving configuration that should be used to
 	// solve this challenge resource.
-	// Only **one** of 'config' or 'solver' may be specified, and if both are
-	// specified then no action will be performed on the Challenge resource.
-	// +optional
 	Solver *ACMEChallengeSolver `json:"solver,omitempty"`
 
 	// IssuerRef references a properly configured ACME-type Issuer which should
diff --git a/pkg/internal/apis/acme/types_challenge.go b/pkg/internal/apis/acme/types_challenge.go
index dadb15285..de0499fa1 100644
--- a/pkg/internal/apis/acme/types_challenge.go
+++ b/pkg/internal/apis/acme/types_challenge.go
@@ -72,9 +72,6 @@ type ChallengeSpec struct {
 
 	// Solver contains the domain solving configuration that should be used to
 	// solve this challenge resource.
-	// Only **one** of 'config' or 'solver' may be specified, and if both are
-	// specified then no action will be performed on the Challenge resource.
-	// +optional
 	Solver *ACMEChallengeSolver `json:"solver,omitempty"`
 
 	// IssuerRef references a properly configured ACME-type Issuer which should