diff --git a/coderd/provisionerdserver/provisionerdserver.go b/coderd/provisionerdserver/provisionerdserver.go
index 261885d0772..381ab67c773 100644
--- a/coderd/provisionerdserver/provisionerdserver.go
+++ b/coderd/provisionerdserver/provisionerdserver.go
@@ -2979,6 +2979,9 @@ func InsertWorkspacePresetAndParameters(ctx context.Context, db database.Store,
 
 		return nil
 	}, nil)
+	if database.IsUniqueViolation(err, database.UniqueIndexUniquePresetName) {
+		return xerrors.Errorf("duplicate preset name, must be unique per template: %q", protoPreset.Name)
+	}
 	if err != nil {
 		return xerrors.Errorf("insert preset and parameters: %w", err)
 	}
diff --git a/coderd/provisionerdserver/provisionerdserver_test.go b/coderd/provisionerdserver/provisionerdserver_test.go
index f3d9c18f551..0e2a5ea8d35 100644
--- a/coderd/provisionerdserver/provisionerdserver_test.go
+++ b/coderd/provisionerdserver/provisionerdserver_test.go
@@ -4009,6 +4009,36 @@ func TestInsertWorkspacePresetsAndParameters(t *testing.T) {
 			}
 		})
 	}
+
+	t.Run("duplicate preset names", func(t *testing.T) {
+		t.Parallel()
+
+		ctx := testutil.Context(t, testutil.WaitLong)
+		logger := testutil.Logger(t)
+		db, ps := dbtestutil.NewDB(t)
+		org := dbgen.Organization(t, db, database.Organization{})
+		user := dbgen.User(t, db, database.User{})
+		job := dbgen.ProvisionerJob(t, db, ps, database.ProvisionerJob{
+			Type:           database.ProvisionerJobTypeWorkspaceBuild,
+			OrganizationID: org.ID,
+		})
+		templateVersion := dbgen.TemplateVersion(t, db, database.TemplateVersion{
+			JobID:          job.ID,
+			OrganizationID: org.ID,
+			CreatedBy:      user.ID,
+		})
+
+		err := provisionerdserver.InsertWorkspacePresetsAndParameters(
+			ctx,
+			logger,
+			db,
+			job.ID,
+			templateVersion.ID,
+			[]*sdkproto.Preset{{Name: "daily-driver"}, {Name: "daily-driver"}},
+			time.Now(),
+		)
+		require.ErrorContains(t, err, `duplicate preset name, must be unique per template: "daily-driver"`)
+	})
 }
 
 func TestInsertWorkspaceResource(t *testing.T) {