The tag is present in Lintian version 2.109.24. That is the most recent version we know about.
The strings "GNU Lesser General Public License", "GNU Library
General Public License", or "LGPL" appear in the copyright file for this
package, but the copyright file does not reference
/usr/share/common-licenses as the location of the LGPL on Debian
If the copyright file must mention the LGPL for reasons other than stating the license of the package, please add a Lintian override.
Please refer to Debian Policy Manual section 12.5 for details.