See the section "Why are there duplicate research items on my profile?" in the help page https://help.researchgate.net/hc/en-us/articles/14293081125777-Reviewing-editing-and-featuring-your-research to get instructions how to merge two entries. But note that merging is not always possible. "Research items will not automatically merge if:

• you have added both of the research items yourself
• all information is not identical
• one of the research items has a DOI [In this case, I recommend to remove the DOI and add it again after merging.]
• both items have different DOIs."

It is better to delete on of the duplicated files.

Dear Dr Emad Kamil Hussein I can not delete the duplicated files because the two same papers have different numbers of citations and different number of readings and I would like to merge these two papers in one paper taking into account new number of citations and readings.