These categories are used to track, build and organize lists of pages needing "attention en masse" (for example, pages using deprecated syntax), or that may need to be edited at someone's earliest convenience.
These categories also serve to aggregate members of several lists or sub-categories into a larger, more efficient list (discriminated by classifications).
Pages are placed in this category when any of the following cite errors are generated on the page:
The named reference $1 was invoked but never defined (see the help page).
Where $1 is the <ref> tag name.
Please do not delete the ref nor comment it out. This error usually occurs because someone deleted another ref with that same name that had text in it. To fix these errors, look in the page history to find the deleted ref and copy its text into the remaining ref with the error message. To find first entry of ref use WikiBlame.