I've found a strange fratricide entry in ACIG's Soviet air-to-air
victories of Cold War database.

http://www.acig.org/artman/publish/article_43.shtml

Date: Nov86*
Unit: V-PVO
Aircraft: MiG-23ML
Weapon: R-77
Victim: An-26

Did the R-77 exist in 1986?

BTW, ACIG team have put together a great site... good job!