Date at copyediting discussion contains date of upgrade ojs

I recently upgraded from ojs to ojs 3.1.2-1. The upgrade process was successful, but when I looked at the back issue and chose an article, I looked at the Copyediting Discussions section, I saw in the From section it turned out that the date contained the date I did the upgrade.

The article was published about 2 years ago, but why was From pda copyediting discussions the date I upgraded?


Is this normal? or is there anything wrong with my upgrade process causing the date to be like that.

thank you