Looks to me like the relevant part of the output is this:
Error copying rows from `app`.`CityPopularity` to `app`.`___CityPopularity_new`: Possible infinite loop detected! The lower boundary for chunk 1 is <ar, ar, ae, ar, ae, 7> and the lower boundary for chunk 2 is also <ar, ar, ae, ar, ae, 7>. This usually happens when using a non-unique single column index. The current chunk index for table app.CityPopularity is guest_language which is not unique and covers 3 columns.
So the tool is not using the primary key for some reason. This might duplicate an existing report. To be investigated.
Looks to me like the relevant part of the output is this:
Error copying rows from `app`.` CityPopularity` to `app`.` ___CityPopulari ty_new` : Possible infinite loop detected! The lower boundary for chunk 1 is <ar, ar, ae, ar, ae, 7> and the lower boundary for chunk 2 is also <ar, ar, ae, ar, ae, 7>. This usually happens when using a non-unique single column index. The current chunk index for table app.CityPopularity is guest_language which is not unique and covers 3 columns.
So the tool is not using the primary key for some reason. This might duplicate an existing report. To be investigated.