Recent reverts
With regards to this, this, and this revert, which I rolled back here, here, and here, the statement added by the anonymous editor that the town "was known as Abdalyar until 1923" is not only unsupported by the source being cited, but also contradicts it (Pospelov states that the name of the town was changed to "Lachin" in 1926; 1923 is when town status was granted). Now, I don't know if there was a name change in 1923 and then another in 1926, but if there was, it will need another reference to support it. Here is what Pospelov says, verbatim:

As can be seen, there is no mention of a renaming in 1923.— • (yo?); June 24, 2015; 14:12 (UTC)