What happened was the masks beard fell off during cleaning and scared that the higher powers would get angry with them a museum official called her husband who performed a botched glue job that also caused glue to fall on the face of the mask and damage it further when a spatula was used to scratch the excess glue off.
Now what is interesting about this whole thing- and what only one report mentioned briefly- is that the beard of the mask was never actually attached to the mask in situ when it was discovered in 1922. It was later glued on in 1941 for display. So in effect we don't even know if the beard was originally meant to be permanently attached in the first place.
I don't understand why the mask would be displayed with the beard on in the first place. If the beard was supposed to be attached it would have been riveted on.
I think what happened was the museum worker was scared she might lose her job over the incident. So one has to then ask why the workplace conditions didn't allow her to feel comfortable enough to approach someone from a higher position to ask for help. I think this is a classic example of what happens when you get a culture in the workforce in which highly qualified academics or medical doctors bully lower qualified staff- you see it all the time in the west. There is a lesson to be learned from this- treat everyone equally and with respect.
https://www.youtube.com/watch?v=v6cvfBX3ql8