/usr/share/lintian/overrides/libwt-dbg is in libwt-dbg 3.1.10-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1
libwt-dbg: conflicts-with-version witty-dbg (<< 3.1.0a-1~)