Errors occurred while trying to save

I've just made some changes to the roads around the retirement community where I live, because the routes of the roads were changed somewhat, a few years ago, when new buildings were constructed here. I used the ID editor, and I very much like the looks of the changes when viewed in that editor. However, when I try to save the changes, I get this error message: "Precondition failed: Way 230172065 requires the nodes with id in 2397936672, which either do not exist, or are not visible. Server returned status code 412"

I downloaded the file "changes.osc," and I opened it in my text editor. Both of the numbers above can be found in the file. Here they are (in boldface), in their immediate contexts (they do not occur together):

<way id="230172065" version="4"><nd ref="2387017546"/><nd ref="2387017547"/><nd ref="-2"/><nd ref="-1"/><nd ref="-4"/><nd ref="-3"/><nd ref="2387017545"/><nd ref="2387017541"/><nd ref="2387017540"/><nd ref="2387017539"/><nd ref="2387017538"/><nd ref="2397936672"/><nd ref="2387017535"/><nd ref="2387017544"/><nd ref="2387017529"/><nd ref="2387017533"/><nd ref="2387017543"/><nd ref="2387017536"/><nd ref="2387017537"/><nd ref="41771022"/><tag k="access" v="yes"/><tag k="bicycle" v="yes"/><tag k="cycleway" v="no"/><tag k="foot" v="yes"/><tag k="highway" v="residential"/><tag k="maxspeed" v="15 mph"/><tag k="name" v="Treeline Drive"/><tag k="oneway" v="no"/><tag k="source" v="GPS"/><tag k="surface" v="asphalt"/></way>

<nd ref="2397936672"/>

I do not understand the error message. Could someone explain it to me, and advise me what to do to correct the problem? Thanks!