So I have a layer in ArcGIS Pro that is sourced from a SQL table view that continuously updates. I have created custom symbology for each unique value of this layer (approximately 30-40 values at any one time). Some values are common and repeat with some certainty, but others are rarer and after 7 days, I may lose the value, only for it to come back a couple days later. My issue is that when that value drops off and comes back, it loses the symbology I set up for it. This data shows up in a web application and it is tedious to update the layer in ArcGIS Pro, update the web map and then rebuild my web application. Is there any way to keep this symbology?