Welcome to OpenStreetMap.

Please try to keep your edits to a smaller geographical area and use a more meaningful changeset comment.

You may find the documentation linked below helpful.
https://wiki.openstreetmap.org/wiki/Changeset#Geographical_size_of_changesets
https://wiki.openstreetmap.org/wiki/Good_changeset_comments

Changing highway=footway to highway=path does not "correct" anything, it simply makes access more ambiguous. Please read:
https://wiki.openstreetmap.org/wiki/OSM_tags_for_routing/Access_restrictions#United_Kingdom

I have restored the original tagging on these paths in https://www.openstreetmap.org/changeset/150395654

You may wish to gain a little more experience before deciding, on your first edit, that all the other mappers who edited the footpaths in Nonsuch Park tagged them incorrectly.