774 is upgrading to a higher version. In the PRs, there is a discussion that 768 should be superseded by 774, which makes sense, as 774 provides a higher version.
However, 774 has build errors, while 768 should work just fine. My suggestion is to rebase and merge 768 to have the upgrade in place already, and then take care of 774 afterwards and see why it breaks.
Thanks for the answer. After reading the comments again, I realized that I misread. There are conflicts now, if you like I can take care of them and merge the PR