Using B_mitch95's method to copy a web map does work, but all points/polygons/lines in the new map will still have the same ObjectID as their counterparts in the original map you copied from; with both maps having the same ObjectID for the same feature, if you change one of the data fields for a point in the new map, the same point in the original map will have that data field changed to the new value you entered. E.g., if you change "date of collection" for a point in the new map to today's date, then go back to the original map you copied from, that point will now show today's date, rather than the original value entered in the past.
How can you copy a web map such that it's your own copy to mess around with? E.g., I'm trying to make a copy of a web map so that I can go in and try to teach myself some new tools that I'll eventually integrate into the original, but I can't risk messing anything up in the original before I figure out the workflow.
In the past I found a way to copy/import layers one at a time while removing the ObjectIDs, but I'm looking for a quicker way, as my map has many layers (i.e., duplicate and divorce the whole map including all feature layers all at the same time). Is this possible?