00066: Query layer has multiple unique identifier fields

There are multiple unique identifier fields chosen for this query layer and you are attempting to publish a service with Feature Access (feature service) enabled.

Solution

• Choose a single field for the query layer's unique identifier.

1. In the table of contents, right-click the query layer whose query you would like to modify.
2. Click Properties to open the Properties dialog box.
3. Click the Source tab.
4. Click Change query.
5. Check the Show Advanced Options check box on the Edit Query Layer dialog box.
6. Click Next.
7. Choose only a single field from the Unique Identifier Field(s) field list.
8. Click Finish.

More information

Although you can use multiple fields as unique identifiers for a query layer, publishing feature services with query layers requires that only one single field be used as the unique identifier for the layer.

Learn more about query layers and choosing a unique identifier field