Hello

I reverted this edit in https://www.openstreetmap.org/changeset/157643791

Several things I'd like to point out:

- please use proper CS comments when editing the database citing good sources for your information
https://wiki.openstreetmap.org/wiki/Good_changeset_comments

- please keep your edits local. There's no need to change a town in northern Germany and one in southern India in one go.
https://wiki.openstreetmap.org/wiki/Changeset#Geographical_size_of_changesets

- making a building out of an island is a bad idea.

please check the wiki before you continue and get in touch with the community at c.osm.org in case of questions

cheers
silversurfer83