Do one of the following: Turn off the field visibility of these fields or remove them from any expressions. For expressions that perform calculations, add a numeric or text field, calculate the values using Calculate Field, and update the expression to use these added fields.Do nothing. The web layer will be shared without the measurement fields.

You are sharing a web layer with one or more measurement fields defined in a pop-up, or a web layer that has an expression that includes one or more of the measurement fields, that is not supported on ArcGIS Online. These fields and expressions will be lost when published. Unsupported m-aware measurement fields are as follows: MeasureMinimum MeasureMaximum MeasureMeasure ValuesPartsUnknown Measures