Some by mistake make multiple same name products in ProfitNx. So those types of Product you can merge in ProfitNx .

Step 1) Go to Master > Product Master > Product Merge
Step 2) After that Open Form of account Merge.
Step 3) Select Old Product and New Product in respective manner.
Step 4) If you want to delete an old Product select the option.
Step 5) And then press Merge ( Alt + M ) (F2)

Note:- If you want to merge an account there is the same Unit , Trading account all setup are same after that you can Product merge otherwise show error.