Dear Nikunj Bagaria,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
We are sorry to hear that you’re having trouble with. I deeply understand the inconvenience caused and apologize for it.
Seems like your objects have Shape protection could you please try the below steps:
- Enable the Developer Tab:
- Go to File > Options.
- Click on Advanced and scroll down to the General section.
- Check the box for Run in developer mode and click OK.
- Unlock Shape Protection:
- Select the shape you want to edit.
- Go to the Developer tab, and in the Shape Design group, click Protection.
- Uncheck the attributes you want to unlock (e.g., From selection, From group, etc.) and click OK.
- Edit Master Shape:
- Right-click on the shape and select Edit Master > Edit Master Shape.
- In the Shape Editor, go to Format > Protection and disable the protection settings.
- Save and close the editor.
- Check Layer Properties:
- Go to the Home tab, in the Editing group, click Layers > Layer Properties.
- Ensure that the layers are not locked.
For reference you can check this article: Prevent or allow changes to shapes - Microsoft Support
We appreciate your understanding that sometimes the initial response may not resolve the problem immediately. However, we can work together to narrow down and resolve the situation. So, please let me know if you have any further questions or if there are any misunderstandings. You can also provide a screenshot related to the issue/error if need be? You can upload the screenshot using this feature:

Once again, I apologize for the inconvenience this has caused. We appreciate your patience and understanding and thank you for your time and cooperation.
Sincerely,
Ralph Chawatama | Microsoft Community Moderator