The change of 
to 
is a quite common mistake, also in combination with 
(cf. e.g. bar 233 and 247 as well as bar 199). Admittedly, in the discussed place the situation is slightly different, yet it is also a misunderstanding of the notation of A that is the most likely reason thereof. Therefore, in the main text we stick to the notation of A.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Inaccuracies in GE, GE revisions
notation: Verbal indications