While the Official MAME Dev Site recommends the latest version for the best accuracy, older versions like 0.139u1 are still widely used because they don't require the extreme CPU power of modern emulators.

is there any mame 0.139u1 on powkiddy v90? or ... - Facebook

When searching for this keyword, users are typically looking for two things: a complete collection (Archive) and a set that has been verified for errors (Patched).

Without these patches, you are not running a "0.139u1 compliant" set—you are simply running an outdated 0.139 collection with constant error messages.

may have historical MAME ROM sets, including 0.139, but downloading copyrighted ROMs is legally questionable unless you own the original arcade PCBs.