I got this popup, can't figure out what's wrong - didn't change anything with fingers only placed them to the model, nothing weird, and now this error appears when I try to generate the rig. 🤔😪😫😨
Ok, I finally got this: this left ring finger's parameter (attribute) was set to Middle instead of Ring. This probably happened when I copied the pose of the middle finger to the ring finger, so the value of this param got copied as well.
As of rrm3_installers_BETA_2023_06_21, the dialog that pops up will tell you the name of the chain, as well as which names are repeated to make it easier to identify the issue.
Ok, I finally got this: this left ring finger's parameter (attribute) was set to Middle instead of Ring. This probably happened when I copied the pose of the middle finger to the ring finger, so the value of this param got copied as well.