You must enter a combination of the {COLUMN1} and {COLUMN2} columns that's unique in the {TABLE_NAME

Summary:

loading customers and getting the above error The combination of columns {COLUMN1} and {COLUMN2} must be unique in table {TABLE_NAME}.

Not sure what to correct

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):