If you attempt to generate the pay355 Complete Update job and it gets stuck for a pay group, displaying the error message above, it's due to inconsistent SMP data records. This inconsistency is causing a duplication error when trying to insert data into the History tables.
To resolve this, support needs to run a script. Please raise a new case online and reference the title of this article. Include the following details:
Affected pay group
Payroll period