Problem creating index

Hy guys, HEELP !
How can I get rid of this index problem (see attachment)
I've eliminated the duplicates on my column ID_ULTIMA_MISCARE and now I'm getting that.

I would find a line in your script, which generates database and all relations. The line should say something like
Create Index ID_ULTIMA_MISCARE ON table_name (key1,key2,key3);

And delete some of the values preceding by the word "key" in my example.
If you really need all of them indexed then you can make it in different index's name.