The "waitOnExternal" property is no longer a child of "availability". You can either use the "external" property under a ...

The "waitOnExternal" property is no longer a child of "availability". You can either use the "external" property under a Dataset's "property" if your current "waitOnExternal" is just an empty block. Alternatively, you can rename "waitOnExternal" to "externalData" and move it under the "policy" of the table.