Posting Date to be changed?

Hi SAP experts,

Is it possible to have a FI document (not yet paid) (status Overdue only) to have the posting date changed?

This document type was created after the IDOC processing and the date posted is February 1st.

This should have been Jan 31st instead.

Are there any legal constraints in editing this via FB02 or is there any other alternative because this posting must be part of pay run from January and not February.

Any help is welcome

Roger