If a previous year FPS only includes figures from the cancel or manual payments completed in current tax year, it is because of a missing or incorrect date on historic data preventing the previously submitted values from being included in the File generation.
To resolve this, support will need to run some checks and updates on the relevant record. Please raise a new case online and reference this article title. When doing so, include the following :
Pay group
Employee reference
Period/Tax year the previous FPS relates to.