Can I break lines at a point without creating a new feature class?

[hannahisreeding]

HELP I want to break my lines at points, but I don't want it to make a new feature class. I just want it to break the lines on the one I already have since it's on a web map 😞 

[DanPatterson]

Alway keep the original should something go wrong, use

Split Line at Point (Data Management)—ArcGIS Pro | Documentation

or edit it manually in an edit session with locally stored data

then put it on the web