ListNumberingToggleRestart

Under.zip (XTextChange) "ListNumberingToggleRestart" - Flip-flop between restart-at-1 and continue-numbering.

Place your text cursor in any block of paragraphs with a style such as "List Number 2" and run the macro. The macro will determine the extent of the block of paragraphs and either restart numbering at "1" at the first paragraph of the block, or allow numbering to continue.

There is no need to select the entire block.