MiG-23MLA?

I’ve never heard of such a variant- as far as I know, the only MiG-23 fighter variants that saw service are:

MiG-23S (only 50 built, for evaluation)
MiG-23M
MiG-23MS
MiG-23MF
MiG-23ML
MiG-23MLD
MiG-23P

So what is the MiG-23MLA, does it really exist, and what were it’s features compared to it’s relatives?