stats: it's OK to not overwrite previous count from the same day

Addresses <#3818>.

Change-Id: I26956a40cc92ba77af14de029292a43a95a9ea9a

src/stats.rs

@@ -592,11 +592,11 @@ pub fn update_invalid_addr_cities(ctx: &context::Context) -> anyhow::Result<()>
         tx.execute("insert into stats_invalid_addr_cities (osm_id, osm_type, postcode, city, street, housenumber, user, timestamp, fixme) values (?1, ?2, ?3, ?4, ?5, ?6, ?7, ?8, ?9)",
             [&row.osm_id, &row.osm_type, &row.postcode, &row.city, &row.street, &row.housenumber, &row.user, &row.timestamp, &row.fixme])?;
     }
-    tx.execute(
-        r#"insert into stats_invalid_addr_cities_counts (date, count) values (?1, ?2)
-               on conflict(date) do update set count = excluded.count"#,
+    // Ignore errors, it's OK to not overwrite previous count from the same day.
+    let _ = tx.execute(
+        "insert into stats_invalid_addr_cities_counts (date, count) values (?1, ?2)",
         [today, invalids.len().to_string()],
-    )?;
+    );
     tx.commit()?;
 
     Ok(())