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Web Application Proxy could not bind the SSL server certificate

You may receive the below error message wgen setting up a Web Application Proxy (WAP) for ADFS on Server 2012 R2

 

Source:        Microsoft-Windows-WebApplicationProxy
Event ID:      12021
Task Category: None
Level:         Error
Keywords:      
User:          SYSTEM
Computer:      <server name>
Description:
Web Application Proxy could not bind the SSL server certificate. Error: Cannot create a file when that file already exists.
 (0x800700b7).
All other configuration settings were applied.

Details:
Certificate thumbprint: <thumbprint id>
Host name: <fqdn of adfs>
 

The WAP still works with this error and we have received it when using a wildcard certificate. Hopefully this will save someone some time as we have rebuilt a server multiple times and still receive the above error.