I assume you used the replace function. Problem with this is that natural=grass isn't used for grasslands but also for urban greens which are typically tagged as landuse=grass instead and this can't be done automatically with a replace function.

Basically, it's a violation of Automated Edits Code of Conduct: https://wiki.openstreetmap.org/wiki/Automated_Edits_code_of_conduct

This, and this change also covers a huge area which can be split into smaller segments: https://wiki.openstreetmap.org/wiki/Changeset#Geographical_size_of_changesets
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            #REVIEWED_BAD #OSMCHA
            Published using OSMCha: https://osmcha.org/changesets/173691990
            