Dear Basser Ali Abdullah ,

This may take much longer than 72 hours. Note also the exceptions listed in https://help.researchgate.net/hc/en-us/articles/14293081125777-Reviewing-editing-and-featuring-your-research:

"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
• both items have different DOIs."

Dear Wolfgang R thank you for your answer, I try to delete DOI from the two publications to make standerization with no way , how can I delete DOI.

Best regard.

See "How do I edit my research item's details?" in https://help.researchgate.net/hc/en-us/articles/14293081125777-Reviewing-editing-and-featuring-your-research for instructions. I recommend to delete the DOI, wait until the entries will be merged, and add the DOI again.

Dear Wolfgang R. Dick thank very much to your continuous help and support.

Best regard.