Workaround to import spaces from newer version to older version of confluence

[P]

Is there an available workaround to importing spaces from a newer version of confluence to an older version? 

I have spaces in confluence version 7.10.2

That I need to import into a confluence on version 6.13.9

From the documentation I've read so far, I know backwards compatibility is not supported. 

I was hoping someone could share a potential workaround. 

Or definitively tell me that what I'm trying to accomplish is impossible without just upgrading the older version. We do not have an active license to do so.