Note that I gave you two links - the second was the Syrian Army. Google it yourself, before embarrassing yourself further.
Listen up...the second link you provided also makes NO mention of Syrian government forces (SAA), only local militia which operate under the loose banner of a National Defense Force (NDF).
Every Syrian village in government control has a National Defense force, and they’re set up to provide a modicum of organized resistance to roving bands of Western trained jihadists that plague the countryside.
The NDF are just local volunteers trained in civil defense with a couple of machine gun mounted Toyota pickups, and are otherwise not fit for service in the Syrian regular army.
After posing for some ‘fake news’ photos on the outskirts of Afrin, I’ll wager the mighty NDF hightailed it right back to whichever Syrian government controlled villages in the next province they came from.
There were no Syrian government forces fighting in Afrin and no agreement with the Syrian YPG to do so. To suggest otherwise is 100% fake news.