Unable to Login to APM Error on xpkarg_xml_string

Document ID : KB000125281
Last Modified Date : 25/01/2019
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One user is trying to log into IT Asset Manager 17.1. When they try to log in they get error:
Error: Violation of PRIMARY KEY constraint 'xpkarg_xml_string'. Cannot insert duplicate key in object 'dbo.arg_xml_string'. The duplicate key value is (1664615908, 0). The statement has been terminated. 
Reset IIS on the Web Server.
Close the browser and open a new browser. Retest the login.