Happening since August 31st MP update.

Error: Replay uploaded mismatches the title used in the track (Replay: Unassigned, Track: Canyon).

A few maps where it's happening:

https://tm.mania-exchange.com/tracks/16465/the-road
https://tm.mania-exchange.com/s/tr/4670
https://tm.mania-exchange.com/tracks/22285/mrdvd-mini-131
https://tm.mania-exchange.com/tracks/21909/mrdvd-mini-127

Recent map working fine:

https://tm.mania-exchange.com/s/tr/127295

This is an unseen side-effect because of this change:

Nadeo Changelog says:
keep the titleid of the map in the replay, if no additional data is required from the current title by the script

The change is one we on MX requested, because people were driving TMStadium tracks in ESL Comp titlepack and were unable to upload replays.

I'm waiting to see what the devs here on MX say first. Hopefully there's a workaround for older Canyon maps.

Thanks for the heads up. And sorry for the inconvenience.

Just talked to TGYoshi. We'll fix that issue on our end.

Stay tuned.

It should work now.

It's working Thanks!

I know this post is a few months old now, but I am still having this problem now.
I can't upload my world record of this map:
Nocturnus

I'm getting the error message:
"Replay uploaded mismatches the title used in the track (Replay: esl_comp@lt_forever, Track: Unassigned)."

So this probably has to do with the fact that i drove in the esl titlepack while hunting this..