Once again, please join the community conversation before changing place=* values at 
https://community.openstreetmap.org/t/new-england-place-name-inflation/103878

The place=* tag is for the the importance of the community relative to its region, not for the incorporation status. Incorporation status can be placed in the border_type=* tag on the boundary relation for the municipality as is seen in this example: https://www.openstreetmap.org/relation/170184#map=13/44.4938/-71.2237
See this community discussion on this topic: https://community.openstreetmap.org/t/administrative-level-of-townships-in-maine/107233

https://www.openstreetmap.org/changeset/146722653