BW on Hana, NW 7.5 - migration of 3x export datasource (8*) necessary?

Hello community,

do I have to migrate also all the export datasources (3x -- to 7x) before we can go on HANA database with 7.5 NW release. I cannot find anything about this in the SCN blogs.

How did you manage this case?

Thanks for your reply.

Best Regards and merry christmas,

Manula