You can Merge the Contacts

Go to Contacts/Customer

By Default its in Kanban View , Change it to list view

Apply Group by Email ID

Select the Partners you want to merge 

Click the Action Button 

Select Merge 

Merge Contacts 

Once the action is complete, you have the option to pursue the deduplication of other Contacts. 

Click the  button , Search Duplicates based on Duplicate data on Email,Name... 

https://www.youtube.com/watch?v=-bKC9k5QDZw

You can also Archive the duplicates , so that it will not show in front end