>>>>>One more thing to add to my initial message. I see this name ( AK_CompReference2) in Keys node and in the Indexes node. And >>What was wrong in doing it through the code? BTW, did you script when you deleted it (just to see what code was generated)?
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>I don't know what you mean by "did you script when you deleted it". How do I script when deleting?

Before saving the changes click on Generate Script button. Alternatively, there is an option to save scripts every time you make changes in the designer.