Error @ swapping amiga-files

i have some amiga-musicfiles looks
FC13.ASTAROTH-1
FC13.ASTAROTH-2-4
FC13.COMMANDO
FC13.DEMO-04
FC13.DEMO-05
FC13.DEMO-44
....
FC13.TRY-1

want swap this to move type to end
Swap seperator . (name & extension)

but the Renamer shows this
TRY-1_1.ASTAROTH-1
TRY-1_1.ASTAROTH-2-4
TRY-1_1.COMMANDO
TRY-1_1.DEMO-04
TRY-1_1.DEMO-05
TRY-1_1.DEMO-44
...
TRY-1_1.FC13 <- only file is correct

its copy the name from a file called FC13.TRY-1 and think it exists a collision

have try another methods to workaround this but the error dont gone.

---

Reply to #1:
Turn off "Rename file pairs with the same new filename".
Menu: Program -> Settings -> Renaming tab

---