A formula or sheet you want to move or copy contains the name '|', which already exists on the destination worksheet. Do ...

A formula or sheet you want to move or copy contains the name '|', which already exists on the destination worksheet. Do you want to use this version of the name?
• To use the name as defined in the destination sheet, click Yes. 
• To rename the range referred to in the formula or worksheet, click No, and enter a new name in the Name Conflict dialog box.