When you change the sequence of revisions on the Sheet Issues/Revisions dialog, the number assigned to each revision changes accordingly. If you use a mix of alphabetic and numeric numbering for revisions, the revision numbers change to reflect their new positions in the overall sequence.
To change the order of revisions
If needed, click Move Up or Move Down multiple times to move the selected revision to the desired location in the revision sequence.
In views and sheets, the revision numbers in tags and revision schedules update to reflect the new sequence.