Handle duplicate route error gracefully

src/commands/publish/route.rs

@@ -98,12 +98,22 @@ fn create(user: &GlobalUser, target: &Target, route: &Route) -> Result<(), failu
         .send()?;
 
     if !res.status().is_success() {
-        let msg = format!(
-            "{} There was an error creating your route.\n Status Code: {}\n Msg: {}",
+        let msg;
+        if res.status().as_u16() == 10020 {
+            msg = format!(
+            "{} A worker with a different name was previously deployed to `{}`. If you would like to overwrite that worker, you will need to change `name` in your `wrangler.toml` to match the currently deployed worker, or navigate to https://dash.cloudflare.com/workers and rename or delete that worker.\n",
             emoji::WARN,
-            res.status(),
-            res.text()?
-        );
+            serde_json::to_string(&route)?
+            );
+        } else {
+            msg = format!(
+                "{} There was an error creating your route.\n Status Code: {}\n Msg: {}",
+                emoji::WARN,
+                res.status(),
+                res.text()?
+            );
+        }
+
         failure::bail!(msg)
     }
     Ok(())