The requested article about a rare Cabu watercolor drawing being put up for sale in Aisne, France, is currently inaccessible due to server permissions restrictions.

The original article, dated November 11, 2025, from the French publication L'Union, was intended to cover the sale of what appears to be one of the rare watercolor works by the renowned French cartoonist Cabu.

However, access to the full article content has been denied by the server, preventing a complete analysis or rewrite of the story. The error reference number 18.6e23c917.1762894600.25813ad0 indicates a technical restriction on the source website.

Without access to the original article content, the specific details about the artwork, its significance, sale price, or auction details cannot be provided at this time.