Error when importing an Update into Employee Master using SSN

When using the SSN instead of the Employee Number during an Employee Import to update fields, I get an error. 

Munis (Prempimp)

Error while importing records

<Exception Type="Application" Message="100|100|prempmst|L3|No records found. Data has been deleted.|0:0" Timestamp="2021-04-16 14:07:48.03800">

• Munis 
• Employee Master
• Employee Import

System Defect.

Install work ticket MUN-409698 once available.

In the meantime, include the Employee Number on the import file/Custom Template when doing an import to update records in Employee Master.