Conforming .DEH File to DEHEXTRA/Doom Retro/MBF21 CompLevel - "Doom Version" & Patch Format?

[Neophyte_Ronin]

When using WhackEd4's CTRL+M function to merge my current .DEH project--geared towards DEHEXTRA & MBF21 functionality,--with one whose Doom version is 19 with a Patch Format of 6, it tells me the intended .DEH file must align with DEHEXTRA & MBF21 standard.  Good.  Which numbers are those?

 

Should be a simple fix; Version & Patch format are the first things you list in a .DEH.  But I never saw a guide or list concerning this and the cutting-edge developments like MBF21 make them antiquated.  I doubt PrBoom+ CompLevel numbers are the same thing, for instance.

 

The .DEH file stems from a ten year-old project whose innards are blacklisted by wxpython's deprecation warnings for WhackEd4's somehow antiquated code, even for a recent beta release (it refuses to load without crashing).  Unless I can reformat the file itself, I have to re-input the .DEH's changes manually.  I've lost my cool about this, so don't expect much.  If there's a list somewhere on the net that said which version corresponds to what, I didn't find it.

 

EDIT: Forget it.  I started looking at other DeHackEd files of games I've played and known are compatible with advanced ports like Boom.  Pay no mind.

Edited July 27 by Neophyte_Ronin
I examined Rowdy Rudy 2, which uses Boom, and its version is 21. I assume that's a magic number. There could be others, but I'll go with that one for now.