Updating a Feature Layer Error

[spf999]

Hi all, 

I am trying to update a new feature layer with data from an old layer that is now deprecated. I am cleaning up my content in ArcGIS Online and want to get rid of the old layer (since there are no active forms attached to it), while keeping the data to feed into a larger multi-year map project I am working on. I went through the steps to upload the data into the feature layer to add these data points but am getting this error message below. I've reviewed that I have a compatible file type and that the headers for the field names are the same. Are there other things that I should check that could be preventing this file from uploading and updating the current feature layer? Or is there a different way I should be going about merging this data with the new layer?

[CameronRex1]

@spf999 Make sure that the Schema is the same between the two layers. You indicated that the "Headers" are the same. I am not sure if your Headers are showing the Field Name or the Alias. Make sure that the Field Names between the 2 layers are the same, and you also want to make sure that the Data Types (Text, Short, Double, etc) are the same. For Text data types, make sure the length is the same (I don't believe this would cause the error, but something to check.)

Hope this helps.