Category:Invalid template usage (Series)

Common issues

• If this error is thrown on multiple child pages that all are a part of the same series then the error is most likely found on the series page itself.
  • The most common issue is the lack of a second parameter to indicate release year (or TBA if unknown).
• The use of Series:<Series-Name> when an actual Series:<Series-Name> page exists will also throw this issue.
• Sometimes a page might be incorrectly added to this category due to cached data (the page itself does not declare this category). For those cases, perform a simple non-important edit (e.g. add a space somewhere) to refresh the cache properly.