I added event hub to my application and App Insight started to emit telemetry with for event dependency. One of the column in this dependency is _MS.links causing downstream workflows to fail due to column name.
Why app insight emits column with _MS. prefix?
customDimensions["_MS.links"] is the "Operation links" used alongside Operation Id (operation_Id), Parent Id (operation_ParentId) and Id (id) for Application Insights to correlate telemetry. See Understanding operation IDs & operation links when working with Event Hubs for more info on that.
Names with special characters should be referenced as x["y"] or x['y'] (instead of x.y), in this case: customDimensions["_MS.links"], as demonstrated here
