Additionally, the inscription “1941” was changed to “1939” - the year when World War II began.

Why it was 1941-1945, for context, from wiki:

On 9 April 2015, the Ukrainian parliament replaced the term Great Patriotic War (1941–1945) (Velyka vitchyzniana viina) in the country’s law with the “Second World War (1939–1945)” (Druha svitova viina), as part of a set of decommunization laws. Also in 2015, Ukraine’s “Victory Day over Nazism in World War II” was established as a national holiday in accordance with the law of “On Perpetuation of Victory over Nazism in World War II 1939–1945”. The new holiday is celebrated on May 8 and replaces the Soviet-Russian Victory Day, which is celebrated on May 9. These laws were adopted by the Ukrainian parliament on April 9 2015 within the package of laws on decommunization.