Edit checking before running macro (with message box)

[yunesm]

I'm trying to control the number of ways people can mess-up this worksheet.

I have several buttons that copy one object from a worksheet "FISH PARTS" and paste them onto another "THE JUMPER FISHBONE"

My question is can I prevent people from copying objects from the first worksheet if they already exist on the second?

Specific to the code below: how do I make sure "BONE_1" doesn't already exist on the worksheet "THE JUMPER FISHBONE" before allowing it to be copied from the other worksheet. And can I generate a message box that tells the user the object already exists on the page.

Sub RESTORE_BONE_1()
Sheets("FISH PARTS").Select
    ActiveSheet.Shapes("BONE_1").Select
        Selection.Copy
            Sheets("THE JUMPER FISHBONE").Select
                Range("B3").Select
                    ActiveSheet.Paste
End Sub

I hope this makes sense. My worksheet is attached. Any thoughts would be very much appreciated!
Thanks!