Standard working hours modified with HDL, how come some assignments are still with the old standard?

Summary:

We need an advice in changing the working hours at the enterprise level. We changed the working hours from 37.5 to 37 hours via an HDL.
We added a line to the employment history for each employee at 37 hours. We noticed that for some random assignments, the standard working hours are still 37.5 hours.

We tried to change the working hours on the specific company in a timely manner, but nothing changed.

What should we check?

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):