[Zope] Error Migration Data.fs from Zope 2.10.4 to 2.13.8

Hi all, I'm trying to update from Zope 2.10.4 to 2.13.8 and have problems to copy Data.fs. No matter whether I try to directly copy Data.fs or use repozo, both times zope gives me the error ValueError: Non-zero version length. Versions aren't supported. Searching the net, this seems to be a common problem. However, I couldn't find a solution for it. Is there a tool anywhere that can convert Data.fs from older to newer formats? Thanks, Frank