I have created a project from scratch and made it available online under the GPL license. Can I release a new version of the same project that does not have the GPL license?
I would also like to know why/why not this is possible.
NOTE: I have not incorporated any external changes to the codebase, all the code was written by me.
Edit: Some seem to think this question is identical to this question (how can a project be relicensed), however I would argue it is not, because that question deals with a general case while I am more interested in what is relevant for GPL in particular (and I think when people google these things they may not google the general case, I know I did not).