Why do I get duplicates of an image with numbers like 1-1-1 but it's the identical image of original

@ragnarp47034604, even with the little information you have provided, you don't have exactly the same problem as the OP.  I am reasonably confident that Elements is not creating any duplicates of your files without you telling it to. 

Based on the limited information you have given, the only possibility I can think of is that when you write the metadata to the files, a temporary copy is being created and that somehow you are importing those temporary files into the catalog, perhaps via a Watched folder.

See this discussion.

. . .  and you didn't give us details of why you had to restore Elements or how or where you did it.  It is possible that your restoration created copies of your files from a backup and if you restored it into the same file structure, your OS gave the copies an additional suffix.

Elements does not create duplicates of your files unless you tell it to.  Your tag system has nothing to do with creating duplicates of files stored on your hard drive.  When you are editing your files in the Editor, you are probably making a copy, using the Save As command, and also keeping it in a Version Set.  When you do this, you will end up with one file e.g. Original file.jpg and another one called Original file-edited-1.jpg.  The edited file will be at the top of the stack.  So, if you decide to edit it again and do a Save as, it will create a new file called Original file-edited-2.jpg.  If you decide to edit that file and do a Save As, but as a copy, not in a Version Set, the file will by default called Orginal file-edited-2 Copy.jpg.  If these files are placed in a watched folder, you will be prompted to import the file into the catalog.  Since the file has been created as a copy, it will not be considered as a duplicate of the original and will be imported again into the catalog. 

There are various other workflows that could cause true duplicate files to be imported into the catalog with various different naming conventions.  If you tell us more about your workflow, we might be able to give further explanation.  But clearly, not all of your files are duplicates.  Instead, they are edited copies.

As for deleting the unwanted duplicates, you could use a file name search (Shift+Ctrl+K) and enter, e.g., -1 in the search text box.  This will display all files with that suffix.  You can then delete them if you no longer want them in your catalog and on your hard drive.