diff --git a/internal/common/common.go b/internal/common/common.go
index b77402ec24b4..99afb9861e38 100644
--- a/internal/common/common.go
+++ b/internal/common/common.go
@@ -120,7 +120,14 @@ func IsImportedCluster(cluster *Cluster) bool {
 }
 
 func AreMastersSchedulable(cluster *Cluster) bool {
-	return swag.BoolValue(cluster.SchedulableMastersForcedTrue) || swag.BoolValue(cluster.SchedulableMasters)
+	// If the topology forces schedulable masters (i.e. there are no workers),
+	// SchedulableMastersForcedTrue will be true, but also it will be enabled
+	// by default in the installer. Since overriding it currently causes a
+	// failure due to a conflict starting with 4.12, we prefer to avoid it. We
+	// only need to override the installer when the user has set
+	// SchedulableMasters explicitly and that is not already the default in the
+	// installer.
+	return !swag.BoolValue(cluster.SchedulableMastersForcedTrue) && swag.BoolValue(cluster.SchedulableMasters)
 }
 
 func GetEffectiveRole(host *models.Host) models.HostRole {
diff --git a/internal/common/common_test.go b/internal/common/common_test.go
index f9e90d5bfb0f..efc4d7c573bc 100644
--- a/internal/common/common_test.go
+++ b/internal/common/common_test.go
@@ -253,8 +253,8 @@ var _ = Describe("Test AreMastersSchedulable", func() {
 		}{
 			{schedulableMastersForcedTrue: false, schedulableMasters: false, expectedSchedulableMasters: false},
 			{schedulableMastersForcedTrue: false, schedulableMasters: true, expectedSchedulableMasters: true},
-			{schedulableMastersForcedTrue: true, schedulableMasters: false, expectedSchedulableMasters: true},
-			{schedulableMastersForcedTrue: true, schedulableMasters: true, expectedSchedulableMasters: true},
+			{schedulableMastersForcedTrue: true, schedulableMasters: false, expectedSchedulableMasters: false}, // Handled by installer
+			{schedulableMastersForcedTrue: true, schedulableMasters: true, expectedSchedulableMasters: false},  // Handled by installer
 		} {
 			test := test
 			It(fmt.Sprintf("schedulableMastersForcedTrue=%v schedulableMasters=%v AreMastersSchedulable? %v", test.schedulableMastersForcedTrue, test.schedulableMasters, test.expectedSchedulableMasters), func() {