Migrate data from feature service with related tables to new feature service

[JohnHuillery1]

I'm attempting to migrate data from a feature service with related tables and attachments (created with Survey123) to a new version of the feature service with a slightly different schema.  I can write the main layer to the new feature service without problem, but when I attempt to write the related tables to the new feature service, I get an error.  Any workarounds?

[JamesTedrick]

Hi John,

Can you provide details on what message you receive in writing the related tables?  How are you trying to bring the data over (which tools are you using)?

[JohnHuillery1]

I’m using the Append tool in ArcGIS Pro and getting this error (see below):

I get this error when I attempt to do it with FME (see below):