What caused those - likely erroneous - ages?
- Often the cause was that the woman's baptism was missing in the records, leading to a bad guess for the birth year, that could simply be improved to a more likely birth year.
- A few times I had made typos - causing the birth year 10 years earlier than it actually was.
- In another case I had to remove the parents: not only was the birth too early, but the children's names didn't match the grandparent's names either, nor was the source a reliable one.