PBI report data source greyed out after saved the description

HI,

We're using the PBI report server version 1.1.6530.30789 (October 2017). Everytime we change the Description from the properties, the Data sources will be greyed out and we cant schedule the refresh. Then I remove the pbix file from the report server in order to re-upload the file again but the Data sources will grey out again everytime we save any description. Our new end users are depend on those description to understand which PBI report they need for thier analysis.

I would appreciated if anyone can helpme on this.

Thanks,

TLau