Taking world edit schematics from 1.15 to 1.8

[nthByte]

I have a bunch of world edit schematics. I've tried using them on a 1.8 server, but I get a world edit error. Is there any way to convert my schematics so that they are usable on a 1.8 server?

 

[Blauspot]

Load the 1.15 schematics, change the b1.9+ blocks to 1.8 blocks, and then schematic that