In future, go to Tools-diagnostics and attach the complete Diagnostics zip file to your NEXT post. It includes SMART for all attached disks, syslog, and many other things that give us a more complete understanding of your situation.
There was really no need to follow the more complicated parity swap procedure since you had no failed disks.
You could have just replaced and rebuilt parity, then added the old parity to a new data slot and let it clear then format it.
But, this way will be even faster.
Just go to Tools - New Config, assign all disks as you want them, and rebuild parity. It should show only the new data (old parity) as needing formatting.
Let us know if any problems or questions.