Dataset Parameters Readonly in Service

Hey all,

I have a pbix  used as a shared dataset to multiple reports. I had a request to temporarily exclude some data for the report. I added a text parameter where the excluded item codes can be added as a csv list. The parameter is used in PowerQuery to filter out the items.

Works great, and the point was to not have to update the pbix file when the list of excluded items needs to be updated. However, when I view the parameter in the data set settings in the service, the value is read-only. I've been unable to find any critieria that would cause this parameter to be read-only. I have used parameters in the past and had not run into this issue beofre. Any ideas are greatly appreciated.

Thanks