Check out these MAME "What's New" files to decide if it's better to use a slightly newer or slightly older version of GroovyMAME with your v0.231 ROMset
or look for an incremental ROMset update from v0.231 to v0.232
or find a whole new ROMset with a matching GroovyMAME release.
v0.232 -
https://www.mamedev.org/releases/whatsnew_0232.txt (updates from v0.231 to v0.232)
If v0.232 doesn't cause any problems with the games you intend to play, use GroovyMAME 0.232 with your 0.231 ROMset.
v0.231 -
https://www.mamedev.org/releases/whatsnew_0231.txt (updates from v0.230 to v0.231)
If v0.232 causes more problems with the games you intend to play than v0.230, use GroovyMAME 0.230 with your 0.231 ROMset.
Scott