Licensing of files taken from Source Extractor

[olebole]

Hi,

I am currently packaging sep for Debian, which includes a documentation of the licenses for all files.

For the files that were taken from Source Extractor, the README states that they have LGPL-3+ as license. The original Source Exctractor files however seem to be GPL-3+ (checked with 2.25.9).

Can you confirm that the relicensing is correct? If yes, could you clarify whether it is LGPL-3 or LGPL-3+, i.e. is a relicensing for newer versions allowed?