Error validating [when_made]: '...'

Description:

Error validating [when_made]: ‘None’

This means you have left the year_made column empty.

Error validating [when_made]: ‘2025’

This means the value you entered is invalid. For this example, we used the year 2025. Since this article is written in 2022, 2025 is not less than or equal to the current year and is thus invalid.

Solution:

You need to enter a valid year into the year_made column.

A valid year means:

• Whole number
• Less than or equal to the current year

For additional information visit the Documentation Page.