When using the Create Relationship Class geoprocessing tool to create a one to many (1:M) relationship class, the attributes are not parsed correctly in the pop-ups of the destination feature class.

Solución alternativa

Package to project to an online service

In ArcGIS Online, select 'Open in ArcGIS Pro' from the item details page to download the package to the local computer. After re-downloading, the pop-ups display correctly in ArcGIS Pro.

Pasos para reproducir