diff --git a/packages/chili/src/commands/boolean.ts b/packages/chili/src/commands/boolean.ts
index c915fde2..eb7b506f 100644
--- a/packages/chili/src/commands/boolean.ts
+++ b/packages/chili/src/commands/boolean.ts
@@ -33,7 +33,11 @@ export abstract class BooleanOperate extends CreateCommand {
     protected override getSteps(): IStep[] {
         return [
             new SelectModelStep("prompt.select.shape", false),
-            new SelectModelStep("prompt.select.shape", false),
+            new SelectModelStep("prompt.select.shape", false, {
+                allow: (shape) => {
+                    return !this.stepDatas[0].models?.map((x) => x.shape()).includes(shape);
+                },
+            }),
         ];
     }
 }
diff --git a/packages/chili/src/commands/create/converter.ts b/packages/chili/src/commands/create/converter.ts
index d1b8b2b6..59a17708 100644
--- a/packages/chili/src/commands/create/converter.ts
+++ b/packages/chili/src/commands/create/converter.ts
@@ -22,6 +22,10 @@ export class ConvertToWire extends CreateCommand {
         return new GeometryModel(this.document, `Wire ${count++}`, wireBody);
     }
 
+    protected override shouldClearSelectedBeforeExcute() {
+        return false;
+    }
+
     protected override getSteps(): IStep[] {
         return [
             new SelectModelStep("prompt.select.edges", true, {
@@ -47,6 +51,10 @@ export class ConvertToFace extends CreateCommand {
         return new GeometryModel(this.document, `Face ${count++}`, wireBody);
     }
 
+    protected override shouldClearSelectedBeforeExcute() {
+        return false;
+    }
+
     protected override getSteps(): IStep[] {
         return [
             new SelectModelStep("prompt.select.edges", true, {
diff --git a/packages/chili/src/commands/create/createCommand.ts b/packages/chili/src/commands/create/createCommand.ts
index 84a60134..4e110d8b 100644
--- a/packages/chili/src/commands/create/createCommand.ts
+++ b/packages/chili/src/commands/create/createCommand.ts
@@ -14,8 +14,14 @@ export abstract class CreateCommand extends MultistepCommand {
 
     protected abstract create(): GeometryModel;
 
+    protected shouldClearSelectedBeforeExcute() {
+        return true;
+    }
+
     protected override beforeExecute(): Promise<boolean> {
-        this.document.selection.clearSelected();
+        if (this.shouldClearSelectedBeforeExcute()) {
+            this.document.selection.clearSelected();
+        }
         return super.beforeExecute();
     }
 }